Flight Deals from Boston to Washington, D.C. from $123

Flights from Boston to Washington peak in price from late March to late June, while early February offers the best deals.

When flying from Boston to Washington, you can expect significant price variations throughout the year. The most expensive times to travel are typically in mid-April and mid-May, peaking at around $250, while the best deals can be found in early February, when fares drop to about $160. The high season for ticket prices spans from late March through late June, with prices consistently above $220. Conversely, low season occurs from early January to mid-February, and then again in early September, where fares can fall below $200. Pay attention to these patterns for smart travel planning.

Book your Boston to Washington flights at least 17 weeks ahead for the best prices; otherwise, expect significant price increases, especially in the last 17 days.

For your trip from Boston to Washington, it's best to book your flights as early as possible, ideally at least 17 weeks before departure. Prices increase steadily as you approach the departure date, climbing from lower ranges around $173 at more than 181 days to about $213 within 17 days, and potentially reaching as high as $371 just prior to departure. The most economical booking window occurs between 76 to 181 days before departure, while costs rise significantly in the final weeks. If you haven't booked yet and your departure is less than 76 days away, do not delay, as the price can soar, especially inside the last 17 days.