Flights Boston → Washington DC
As of October 2026, economy flights from Boston to Washington DC have a typical range USD 272–372, median USD 282. Full range across all 212 offers: USD 225–604. We analyzed 212 offers from 7 airlines in a single price check.
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Boston → Washington DC
Based on 212 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Boston → Washington DC
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Southwest Airlines | Included | Included | — |
| American Airlines | Included | USD 35 | — |
| United | — | USD 100 | — |
| Delta | — | USD 90 | — |
| Southwest | — | USD 90 | — |
| jetBlue | Included | USD 35 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Boston to Washington DC cost?
Based on 212 offers · October 2026
Boston to Washington DC flights ranged from USD 225 to USD 604 across 212 offers analyzed in October 2026. The chart below shows how prices distributed across all 212 offers.
These 212 offers (October 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 272 and USD 332
What hidden fees do Boston to Washington DC flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Boston to Washington DC routes. The breakdown below is based on 212 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| WN | 0 | 0% |
| AA | 45 | 15% |
| United | 100 | 30% |
| Delta | 90 | 33% |
| Southwest | 90 | 33% |
| B6 | 45 | 13% |
United: base ~USD 216 + fees USD 100 = ~USD 316 total. B6: base ~USD 279 + fees USD 45 = ~USD 324 total.
United's USD 100 ancillary fees narrow the gap with B6's lower-fee model — the USD 63 base difference shrinks to USD 8 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Boston to Washington DC?
7 airlines flew Boston to Washington DC in this dataset. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Frontier | 6 | — | 225 | n/a |
 Delta | 17 | — | 272 | 90 (33%) |
 Southwest | 2 | — | 273 | 90 (33%) |
 American Airlines | 100 | 272–348 | 282 | 45 (16%) |
 Southwest Airlines | 51 | 272–591 | 309 | 0 (0%) |
 United | 18 | 272–446 | 316 | 100 (32%) |
 B6 | 18 | 318–395 | 324 | 45 (14%) |
Where do the best Boston → Washington DC prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from travel agency sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Boston to Washington DC flights
- Full-service carriers on Boston–Washington DC cost 1.0x more than budget airlines (USD 290 vs USD 283 median; overall median USD 282).
- United charges 2.2x more in ancillary fees than B6 — USD 100 vs USD 45 avg per booking.
- The same route priced USD 21 apart depending on where it was booked — the lowest median was USD 272. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Boston to Washington DC cost?
- Based on 212 offers analyzed, Boston to Washington DC flights range from USD 225 to USD 604, with a median price of USD 282. Search for your specific dates →
- What hidden fees should I expect on Boston to Washington DC flights?
- On average, ancillary fees (bags, seat selection) add USD 43 to the base fare on Boston to Washington DC flights. See itemized fees for your itinerary →
- Which airline is cheapest on Boston to Washington DC including all fees?
- Frontier has the lowest median fare on Boston to Washington DC at USD 225 (median across 6 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Boston–Washington DC flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 272. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Boston to Washington DC routes?
- Boston to Washington DC has 7 airlines competing, creating a price range from USD 225 to USD 604 across 212 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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