Flight Deals from Chicago to St. Louis from $108

Flights from Chicago to St. Louis cover about 250 miles. The typical nonstop flight takes 1 hour 15 minutes, and the return leg takes about 1 hour 10 minutes — a difference too small to matter. The route is served daily by Southwest, American, United, and their regional partners.

Methodology

Flight times and distances come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). The typical flight time is the median scheduled block time across all carriers on the route, computed the same way in both directions so the difference reflects prevailing winds rather than any change in method. Distance is the great-circle distance between the two airports, so the actual flown track is typically 2-5% longer.

Yes, there are plenty of direct flights from Chicago to St. Louis, with United, Southwest, and American Airlines all flying the route non-stop every day of the week. United runs the most frequency — up to 41 weekly flights from O'Hare (many operated by GoJet, plus some by SkyWest) — while Southwest offers up to 39 weekly flights from Midway and American up to 20 from O'Hare. Service runs daily on all three carriers, so you can find a non-stop flight any day you choose.

Methodology

Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.

St. Louis Lambert International Airport offers several ground transportation options to downtown, including the MetroLink light rail, taxis, rideshares like Uber and Lyft, hotel shuttles, and rental cars from major agencies such as Avis, Budget, Enterprise, and Hertz. The MetroLink Red Line runs directly from the airport to downtown and is widely regarded as one of the best mass transit systems in the country, with trains every 7–15 minutes. Taxis cost around $30–45 to downtown, while rideshare pickup zones are located at Terminal 1 Door 6 and Terminal 2 Door 12. Car rentals are available at the airport’s Rental Car Center via a free shuttle. The MetroLink is the most-used and often fastest option for reaching the city center, especially during peak hours.

References

• Parking & Transportation - St. Louis Lambert International Airportflystl.com · Published Aug 17, 2026
• St. Louis Transportation | Soul Of America | St. Louissoulofamerica.com · Published Aug 12, 2025
• St Louis Public Transportation and Airport Optionsexplorestlouis.com
• A Guide to St. Louis Lambert International Airport (STL) | Chasechase.com · Published Sep 10, 2025
• How to get from St Louis Airport (STL) to Saint Louis, MO | Uberuber.com · Published Oct 2, 2026
• St Louis Airport Transfers: Pickup & Shuttleuber.com
• Find cheap flights to Saint Louis (STL) | American Airlinesaa.com · Published Aug 17, 2026

Average fares from Chicago to St. Louis bottom out around $284 in late January, making that the cheapest stretch to fly. The cheapest months overall are October at $289, February at $292, and August at $292, while the most expensive period is late March with an average fare of $339.

Methodology

Seasonal fares come from Priceline's own air booking-summary archive, analysed in-house and refreshed monthly. For each day of the year we take a representative round-trip fare, a blend of the 25th-percentile and average ticket price over the route's bookings, and smooth the series into a seasonal curve; the half-month low and high and the monthly figures quoted here are averages of that curve. Thin and international routes borrow their seasonal shape from the nearest busy routes, with the price level anchored to the route's own bookings.

Book about 6 weeks before departure for the best fares from Chicago to St. Louis, around $108. Booking in the final days before the flight costs about $180, $72 more. Booking six months ahead runs about $194. Fares are adjusted to current market conditions.

Methodology

Booking-window guidance comes from the same monthly in-house analysis of Priceline's own air booking-summary archive. We aggregate the route's bookings by how many days before departure they were made, from about 180 days out to the day of travel, smooth the curve, and highlight the stretch of lead times with the lowest average fare. Thin and international routes borrow the curve shape from the nearest busy routes, anchored to the route's own price level. It reflects current fares and is refreshed monthly.

Yes, overnight red-eye flights operate from Chicago to St. Louis: American Airlines runs a daily nonstop from O'Hare departing around 11:00 PM and landing at 12:16 AM, arriving just after midnight in the early hours rather than the next morning.

Methodology

Red-eye flights are identified from scheduled local departure and arrival times and block times in our flight-schedule database — built from published airline timetables and official schedule data, including U.S. Department of Transportation records for domestic routes. A flight counts as a red-eye when it departs in the afternoon or evening (3 p.m. or later local time) or in the early hours before 4 a.m., and is in the air at some point between midnight and 4 a.m. local time at both its departure airport and its arrival airport. An evening flight that lands before midnight at its destination is never counted, nor is a morning departure or a daytime long-haul that reaches the next calendar date only because of time zones. Each red-eye is labelled with its timing (for example, overnight and landing the next morning, or late-night and landing after midnight). For connecting itineraries the same rule is applied to the longer leg, from one representative day's flight search.

United Airlines, Southwest Airlines, and American Airlines all fly nonstop from Chicago to St. Louis, with daily service throughout the week. United operates the most flights, with up to 41 weekly departures from O'Hare, while Southwest runs about 39 weekly flights from Midway and American adds roughly 49 weekly flights from O'Hare, including regional operations under United Express and American Eagle. Departures are spread across the day from early morning to late evening, with the earliest around 7:04 AM and the latest at 11:00 PM.

Methodology

Airlines and weekly frequencies come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a typical fare is shown for a carrier, it is the median of the real fares Priceline users found on this route in the last 72 hours.

The most reliable airline on this route is Republic Airways (marketed as American Eagle or United Express), with 88.3% of flights arriving within 15 minutes of schedule and a 1.3% cancellation rate. Southwest follows at 84.5% on-time arrivals and just 0.6% cancellations, while Envoy Air ranks third at 82.0%. United mainline achieves 74.7% on-time arrivals with 0.6% cancellations, and American mainline sits at 68.0% with 0.9% cancellations.

Methodology

On-time arrival and cancellation rates come from the U.S. Bureau of Transportation Statistics (BTS) Airline On-Time Performance dataset, which covers U.S. domestic routes only; a flight counts as on time when it arrives within 15 minutes of schedule. Carriers are ranked by arrival on-time rate on this route, and the carrier list itself comes from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI).

St. Louis Lambert International Airport is the only commercial airport serving St. Louis. It is about 14 miles northwest of downtown and close to major attractions like Forest Park.

The CTA Blue Line 'L' train runs 24/7 from downtown Chicago directly to O'Hare, taking about 45 minutes and costing $5, making it the most economical and popular option. Taxis and rideshares like Uber or Lyft are faster at roughly 30–40 minutes but cost $35–$60, picking up from designated areas at each terminal. Shared shuttle services such as GO Airport Express also serve the airport, while driving and parking on-site is available for those who prefer their own vehicle.

References

• Public Transit | Chicago O’Hare International Airport (ORD)flychicago.com:443
• Taxi, Limo, TNP | Chicago O’Hare International Airport (ORD)flychicago.com:443
• Find cheap flights to Chicago (ORD) | American Airlinesaa.com · Published Sep 12, 2026
• How to get from O'Hare Airport (ORD) to Chicago, IL | Uberuber.com · Published Sep 18, 2026
• ord | Qantas AUqantas.com
• ORD Airport Taxi Cab - Request a Ride with Uberuber.com
• O'Hare Flyeren.wikipedia.org · Published Oct 1, 2026
• Transportation in Chicagoen.wikipedia.org · Published Sep 1, 2026

St. Louis Lambert International Airport has no directly connected or on-site hotel, but several nearby hotels offer shuttle service, including the Marriott St. Louis Airport, Wingate by Wyndham St. Louis Airport, Drury Inn Airport St. Louis, Pear Tree Inn St. Louis Airport, Hampton Inn St. Louis Airport, Hilton St. Louis Airport, and Hyatt Place St. Louis Airport. The Marriott St. Louis Airport is 0.3 miles from the terminal, and the Renaissance St. Louis Airport Hotel provides a complimentary airport shuttle.

References

• 15 Best Hotels near Lambert St Louis Intl Airport (STL) for 2026 | U.S. News Traveltravel.usnews.com · Published Sep 7, 2022
• Places to Stay | Marriott – St. Louis Airportvisitmo.com · Published Jun 4, 2026
• St. Louis Lambert Airport Guide (STL) - Sleeping in Airportssleepinginairports.net · Published Aug 6, 2018
• St Louis Lambert Intl Airport Overview and FBOs (St Louis, MO) [KSTL/STL] - FlightAwareflightaware.com
• Hotels near St. Louis Airport | Renaissance St. Louis Airport Hotelmarriott.com · Published Oct 10, 2024
• Places to Stay | Hilton St. Louis Airportvisitmo.com · Published Jun 4, 2026

Travelers arriving at St. Louis Lambert International Airport can use free Wi-Fi in 4-hour sessions and find mobile charging points in gate areas. ATMs are available throughout the airport, with locations in Concourse A near Gate A10, Concourse C near Gate C15, Terminal 1 landside at the Mid-Level Stage, and Terminal 2 near Gate E20 and the entrance doors. A US Bank branch in Terminal 1's Lower Level near the Concourse C security checkpoint offers full-service banking and currency exchange, open weekdays from 8:00 AM to 5:00 PM. Interfaith chapels are available in Terminal 1 landside near Exit Door 11 and Terminal 2 airside near Gate E40. Families can use Family Assist rooms near restrooms throughout the terminals, a transportation-themed children's play area called the St. Louis International Play Port near Gate C3, and three lactation suites across the concourses. Service animal relief areas are located near Gate A16, exterior near Exit 6 in Terminal 1, and exterior near Exit 10 in Terminal 2. Permanent and rotating art exhibits are displayed throughout the terminals, and baggage carts are available for $6 per cart in Terminal 1 departures and baggage claim areas of both terminals.

References

• St. Louis Lambert Airport Guide (STL) - Sleeping in Airportssleepinginairports.net · Published Apr 13, 2026
• Shop, Dine & Services - St. Louis Lambert International Airportflystl.com · Published Jun 5, 2026
• DT-442-STL-2024-map-T1-sg16flystl.com · Published Jul 8, 2025
• St. Louis Lambert International Airportyoutube.com · Published May 4, 2025
• St Louis Airport (STL) | Terminal maps | Airport guideairport.guide
• STL Airport Guide - All About St. Louis International Airporttheparkingspot.com · Published Nov 10, 2019
• Google Mapsgoogle.com
• ST. LOUIS LAMBERT INTERNATIONAL AIRPORT - STL - Updated September 2026 - 1338 Photos & 1094 Reviews - 10701 Lambert International Blvd, Saint Louis, Missouri - Airports - Phone Number - Yelpyelp.com · Published Nov 8, 2022

At Chicago O'Hare International Airport, wheelchair assistance is coordinated through each airline and must be requested directly with your carrier before travel, while TSA Cares at 855-787-2227 can help with security screening accommodations and sensory-friendly resources are available. O'Hare also offers accessible restrooms, companion plus restrooms, service animal relief areas, and an on-site ADA Coordinator reachable Monday through Friday. At Lambert–St. Louis International Airport, travelers with disabilities can access wheelchair assistance, accessible restrooms, elevators, service animal relief areas, and an Information and Paging Booth staffed daily from 7am to 11pm at 314-890-1333, with ADA concerns directed to the Title VI Coordinator at 314-426-8094. Travelers should arrange mobility assistance through their airline before the flight.

References

• Terminal Accessibilityflychicago.com:443
• Accessibility Options at O’Hare International Airport (ORD) | Loyola University Chicagoluc.edu
• Accessibility Guide | Chicago O’Hare International Airport (ORD)flychicago.com:443
• STL’s T2 Metrolink Station Elevator Out Of Service - St. Louis Lambert International Airportflystl.com · Published Apr 3, 2022
• St. Louis Lambert International Airportcrunchbase.com · Published Jul 22, 2026
• Civil Rights - St. Louis Lambert International Airportflystl.com · Published Jul 15, 2025
• Saint Louis Lambert | Fastrackfastrackvip.com · Published Mar 3, 2026

Southwest, the most frequent operator on Chicago–St. Louis, uses the Boeing 737 family, including the 737-700. United and its regional partners fly a mix: United mainline uses the Boeing 737 family, GoJet and SkyWest operate Bombardier CRJ-700s, and Envoy Air and Republic Airways fly Embraer E170 and E175 variants. American Airlines mainline contributes the Airbus A319.

Methodology

Aircraft types come from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). For U.S. routes the type is grounded in the tail number that actually operated the flight; elsewhere it comes from the airline's filed equipment code. Where the source does not commit to a specific variant we name the aircraft family (for example Airbus A320 family) rather than guess, and where no reliable type is on file the aircraft is omitted rather than estimated. Types describe typical scheduled equipment and can vary with seasonal or day-of-week assignments and last-minute swaps.

Nonstop flights from Chicago to St. Louis are operated by United Airlines (Star Alliance), American Airlines (oneworld), and Southwest Airlines, which belongs to no alliance. United and American also fly much of this route through their regional partners, GoJet, Envoy, SkyWest, and Republic, which fly under those mainline brands but are not themselves alliance members. Other alliances may serve the route via connections.

Methodology

Airlines and weekly frequencies are compiled from our flight-schedule database, which combines published airline timetables, U.S. government schedule data from the Bureau of Transportation Statistics (BTS), and observed flight operations from the EUROCONTROL/OpenSky Open Performance Data Initiative (OPDI). We count each operating carrier's scheduled weekly departures and the days it flies; where there is no nonstop service, connecting carriers are identified by linking scheduled nonstop segments through common hub airports. Where a median fare is shown for a carrier, it reflects the real fares Priceline users found on this route in the last 72 hours.

Chicago O'Hare International Airport offers a strong lineup of lounges across Terminals 1, 2, 3, and 5. United travelers have five United Club locations (near gates B6, B18, C10, E7, and F9) plus the flagship United Polaris Lounge at Gate C18, reserved for international first and business class passengers. American Airlines operates three Admirals Clubs in Terminal 3 (gates G8, L2A, and H6/K6) along with a Flagship Lounge for Concierge Key members and international Flagship First passengers. Terminal 5 houses the Air France Lounge, Delta Sky Club at Gate M13, LOT Business Class Lounge, and Swissport Lounge, with access generally tied to airline status, premium cabins, or Priority Pass membership.

References

• List of Airport Lounges at Chicago O'Hare Int'l Airport [ORD]upgradedpoints.com · Published Jul 7, 2026
• The best lounges at Chicago’s O’Hare — and how to get inside - The Points Guythepointsguy.com · Published Apr 4, 2025
• Best Airline Lounges At Chicago O’Hare Airport (ORD) – Luxury Travel Diaryluxurytraveldiary.com · Published Jan 2, 2021
• Airline Lounges | Chicago O’Hare International Airport (ORD)flychicago.com:443
• O'Hare Airport Lounges 2026: Complete Guide + Free Accessjoinkudos.com · Published May 14, 2025
• Airline lounges offer respite at O’Hare International Airport | Choose Chicagochoosechicago.com · Published May 28, 2025
• United Club Chicago - LoungeReview.comloungereview.com · Published Apr 1, 2026
• Swissport Lounge ORD AIRPORT Terminal 5 Chicago IL O Hare Intl | Priority Passprioritypass.com

Same-day changes and standby depend on the airline and fare type, with flexible tickets and premium cabins offering the most options while Basic Economy typically does not.