Flight Deals from Chicago to Ulan Bator from $665

The flight from Chicago to Ulaanbaatar is about 6,194 miles and requires a connection, as there is no scheduled nonstop service on this route.

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.

There are no non-stop flights between Chicago and Ulaanbaatar. The shortest connecting routing is United Airlines via Frankfurt, taking 21 hours 15 minutes with a 505-minute first leg (8h25m), a 500-minute second leg on MIAT Mongolian Airlines (8h20m), and a 270-minute (4h30m) layover. Lufthansa and MIAT Mongolian Airlines also connect through Frankfurt, and Cathay Pacific connects via Hong Kong.

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.

From Chinggis Khaan International Airport to central Ulaanbaatar, the main options are official taxis, shuttle buses, and private transfers, with no train or metro service on this route. The airport runs a 24-hour public bus service, including a night route to Sukhbaatar Square, making it the cheapest and most-used option. Taxis are widely available and offer fixed fares through the official counter, with a typical ride to the city center taking about 50 minutes to an hour and costing roughly 17,500–21,500 MNT. For a more comfortable, bookable option, private transfers and VIP taxi services operate sedans, minivans, and minibuses with meet-and-greet service. Ride-sharing via UBCab is also an option, though the official airport taxi counter is the most reliable for fair pricing.

References

• How to Get from Ulaanbaatar Airport to the City Center - Meanwhile in Mongoliameanwhileinmongolia.com · Published Sep 8, 2023
• Chinggis Khaan International Airport, Airport Expressway, Sergelen, Töv, Mongolia to Kempinski Hotel Ulaanbaatar Taxi Fare (2026 Prices)gobytaxi.com · Published Aug 17, 2026
• Public transporten.ulaanbaatar-airport.mn
• BEST 5* Chinggis Khaan Airport UBN to Ulaanbaatar Transfer Taxi in Ulaanbaatar, Mongolia - 140477P3 - Trip Canvasaaa.com
• VIP Taxi Service LLCen.ulaanbaatar-airport.mn
• Ulaanbaatar Transportation: Get in and Get Aroundtravelchinaguide.com
• Chinggis Khaan International Airporten.wikipedia.org · Published Sep 15, 2026
• Quick Read: Mongolia's International Airports Explainedlumsx-bbb.lums.edu.pk · Published Jan 5, 2026

Yes, overnight red-eye service is available from Chicago to Ulaanbaatar as a connecting itinerary: United's long leg from ORD to Frankfurt departs at 18:30 and arrives at 09:55 the next morning, then connects to MIAT Mongolian Airlines (OM) after a 4h30m layover in Frankfurt. There is no nonstop red-eye on this route.

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.

There is no nonstop service from Chicago to Ulaanbaatar; the usual one-stop routings connect through Frankfurt or Hong Kong. The most common carriers are United Airlines and MIAT Mongolian Airlines via Frankfurt, with Lufthansa also appearing on the Frankfurt leg, and Cathay Pacific via Hong Kong. United and Lufthansa are Star Alliance members, while Cathay Pacific is oneworld; MIAT Mongolian Airlines is not in a major alliance. The quickest connection is United via Frankfurt at about 21 hours 15 minutes total.

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.

Ulaanbaatar has one international airport, Chinggis Khaan International Airport, located about 50 km south of the city centre. It serves all international and domestic flights.

The CTA Blue Line 'L' train is the fastest and most popular way to reach O'Hare from downtown Chicago, running 24/7 with a direct ride of about 45 minutes and the lowest fare. Taxis and ride-shares like Uber and Lyft are also available from designated curbside areas, taking roughly 30–40 minutes and costing more. Shared-ride shuttle vans connect the airport to downtown and nearby suburbs, and drivers can reach the terminals via I-90/I-190 with parking available in the airport's lots and garages.

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

There are no hotels at Ulaanbaatar's Chinggis Khaan International Airport. The drive to the city center takes about 30–40 minutes, where nearby hotels are available. Most seats in the terminal can be used for sleeping, with padded benches near Gates 1–6.

References

• Ulaanbaatar Airport Guide (ULN) - Sleeping in Airportssleepinginairports.net · Published Mar 25, 2024

Chinggis Khaan International Airport offers free Wi-Fi throughout the terminal, though registration may be required. Facilities include a 24-hour café on the landside first floor, a restaurant airside from 6:00 AM to 10:00 PM, a Burger King, and a Carrefour Market convenience store. ATMs from multiple banks are available, and three banks operate on the second floor with weekday and limited weekend hours. Duty-free shopping is offered, including a 24-hour shop on the third floor. Nursing rooms and a children's play area for ages 2–12 are located in the check-in lobby and Domestic Arrivals Hall. Luggage storage is available on the first floor at store #126, and a 24-hour first aid station is on the first floor right wing. Smoking rooms are airside opposite Gates 1 and 6, and drinking water stations are located airside near the washrooms and behind the convenience store on the Arrivals Level.

References

• Ulaanbaatar Airport Guide (ULN) - Sleeping in Airportssleepinginairports.net · Published Mar 25, 2024
• Business Loungeen.ulaanbaatar-airport.mn · Published Oct 31, 2024
• Chinggis Khaan International Airport is a 4-Star Airportskytraxratings.com · Published May 31, 2024

Chicago O'Hare International Airport offers wheelchair assistance coordinated through each airline, with ADA-related requests made directly to your carrier, plus TSA Cares screening support at 855-787-2227 and a Sunflower lanyard program for hidden disabilities. Companion Plus restrooms, accessible showers, and service animal relief areas are available throughout the terminals. At Chinggis Khaan International Airport in Ulaanbaatar, assistance service bookings can be placed 1–30 days in advance but must be made at least 24 hours before travel, with guidance for visually or hearing impaired and wheelchair-bound passengers, and the airport joined the Sunflower Program in 2026. For both airports, arrange mobility assistance through your airline ahead of 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
• Guidance & Assistanceen.ulaanbaatar-airport.mn
• CHINGGIS KHAAN INTERNATIONAL AIRPORT JOINS THE HIDDEN DISABILITIES SUNFLOWERen.ulaanbaatar-airport.mn · Published Mar 5, 2026

There is no nonstop service between Chicago and Ulaanbaatar. Currently, United and MIAT Mongolian Airlines operate one-stop itineraries via Frankfurt using Boeing 787-8 aircraft on the long-haul segment, while Cathay Pacific connects through Hong Kong with an Airbus A350-1000. MIAT also flies Boeing 747-8 and Boeing 787-10 on some Frankfurt connections, and the short leg from Hong Kong to Ulaanbaatar uses a Boeing 737-800.

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.

There is no nonstop service from Chicago to Ulaanbaatar, so the route is flown as a one-stop connection, with Star Alliance (United and Lufthansa, typically via Frankfurt) and oneworld (Cathay Pacific, via Hong Kong) as the alliances actually operating it. MIAT Mongolian Airlines, the Mongolian flag carrier that carries the Ulaanbaatar leg on most of these itineraries, belongs to no alliance. Other alliances may serve this route via connections, but these are the carriers currently scheduled.

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.

For departures from Chicago O’Hare, the standout lounge is the United Polaris Lounge in Terminal 1 near gate C18, reserved for United international first- and business-class passengers as well as Star Alliance premium-cabin travelers, with a complimentary full-service restaurant, private relaxation areas, and shower suites. United also operates five United Club lounges across Terminals 1 and 2 (near gates B6, B18, C10, E7, and F9), open to members, Star Alliance Gold status holders, and premium-cabin passengers on same-day international itineraries. American Airlines offers three Admirals Clubs in Terminal 3 at gates G8, L2A, and H6/K6, along with a Flagship Lounge accessible to Concierge Key members and Flagship First passengers on international flights. Terminal 5 houses the Air France Lounge, Delta Sky Club, LOT Polish Business Class Lounge, Swissport Lounge, and SAS Lounge, with access typically tied to business-class tickets, elite status, or Priority Pass membership. The LOT Business Lounge at gate M18 features floor-to-ceiling views, 165 seats, showers, charging stations, and workspaces for LOT Business Class and eligible Star Alliance status holders.

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 operating carrier and fare class; flexible tickets and premium cabins offer the most reliable options on this route.