Flights Ontario → Washington DC
As of November 2026, economy flights from Ontario to Washington DC have a typical range USD 410–542, median USD 518. Full range across all 516 offers: USD 284–550. We analyzed 516 offers from 8 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: Ontario → Washington DC
Based on 516 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Ontario → Washington DC
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier Airlines | — | — | — |
| Alaska Airlines | Included | USD 35 | — |
| United | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
| Southwest Airlines | Included | Included | — |
| United | — | USD 100 | — |
| American | — | USD 110 | — |
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 Ontario to Washington DC cost?
Based on 516 offers · November 2026
Ontario to Washington DC flights ranged from USD 284 to USD 550 across 516 offers analyzed in November 2026. The chart below shows how prices distributed across all 516 offers.
These 516 offers (November 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 442 and USD 536
What hidden fees do Ontario to Washington DC flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Ontario to Washington DC routes. The breakdown below is based on 516 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 10 | 3% |
| AS | 45 | 10% |
| UA | 45 | 10% |
| AA | 45 | 10% |
| WN | 0 | 0% |
| United | 100 | 24% |
| American | 110 | 27% |
American: base ~USD 301 + fees USD 110 = ~USD 411 total. United Airlines: base ~USD 397 + fees USD 45 = ~USD 442 total.
American's USD 110 ancillary fees narrow the gap with United Airlines's lower-fee model — the USD 96 base difference shrinks to USD 31 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 Ontario to Washington DC?
8 airlines flew Ontario 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.
Even on the cheapest airline (Frontier Airlines), fares ranged USD 288–356 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Frontier Airlines | 6 | 288–356 | 294 | 10 (3%) |
 Frontier | 7 | 292–351 | 332 | n/a |
 United | 13 | 411–440 | 411 | 100 (24%) |
 American | 2 | — | 411 | 110 (27%) |
 United Airlines | 101 | 410–518 | 442 | 45 (10%) |
 American Airlines | 102 | 410–533 | 442 | 45 (10%) |
 Alaska Airlines | 9 | 381–517 | 485 | 45 (9%) |
 Southwest Airlines | 276 | 489–542 | 536 | 0 (0%) |
Where do the best Ontario → 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 meta-search 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: Ontario to Washington DC flights
- Full-service carriers on Ontario–Washington DC cost 1.1x more than budget airlines (USD 438 vs USD 388 median; overall median USD 518).
- American charges 11.0x more in ancillary fees than F9 — USD 110 vs USD 10 avg per booking.
- The same route priced USD 239 apart depending on where it was booked — the lowest median was USD 284. 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 Ontario to Washington DC cost?
- Based on 516 offers analyzed, Ontario to Washington DC flights range from USD 284 to USD 550, with a median price of USD 518. Search for your specific dates →
- What hidden fees should I expect on Ontario to Washington DC flights?
- On average, ancillary fees (bags, seat selection) add USD 22 to the base fare on Ontario to Washington DC flights. See itemized fees for your itinerary →
- Which airline is cheapest on Ontario to Washington DC including all fees?
- Frontier Airlines has the lowest median fare on Ontario to Washington DC at USD 294 (median across 6 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Ontario–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 284. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Ontario to Washington DC routes?
- Ontario to Washington DC has 8 airlines competing, creating a price range from USD 284 to USD 550 across 516 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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