Flights Washington → Denver
As of October 2026, economy flights from Washington to Denver have a typical range USD 199–850, median USD 325. Full range across all 116 offers: USD 146–1037. We found 57% of 116 offers from budget carriers (around USD 233) and 43% from full-service carriers (around USD 435).
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: Washington → Denver
Based on 116 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Washington → Denver
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier Airlines | — | — | — |
| Southwest Airlines | Included | Included | — |
| Southwest | — | USD 45 | — |
| American Airlines | Included | USD 35 | — |
| United | Included | USD 35 | — |
| Delta | Included | USD 35 | — |
| JetBlue | — | 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 Washington to Denver cost?
Based on 116 offers · October 2026
Washington to Denver flights ranged from USD 146 to USD 1037 across 116 offers analyzed in October 2026. Two fare clusters detected: budget fares around 190 and premium fares around 369 The chart below shows how prices distributed across all 116 offers.
These 116 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 225 and USD 492
What hidden fees do Washington to Denver flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Washington to Denver routes. The breakdown below is based on 116 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 10 | 5% |
| WN | 17 | 7% |
| Southwest | 45 | 22% |
| AA | 45 | 18% |
| UA | 43 | 8% |
| DL | 45 | 7% |
| B6 | 28 | 6% |
Southwest: base ~USD 160 + fees USD 45 = ~USD 205 total. Frontier Airlines: base ~USD 204 + fees USD 10 = ~USD 214 total.
Southwest's USD 45 ancillary fees narrow the gap with Frontier Airlines's lower-fee model — the USD 44 base difference shrinks to USD 9 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 Washington to Denver?
7 airlines flew Washington to Denver in this dataset. The route shows a clear split between low-cost and full-service carriers. 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 (Southwest), fares ranged USD 200–205 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) |
|---|---|---|---|---|
 Southwest | 9 | 200–205 | 205 | 45 (22%) |
 Southwest Airlines | 32 | 199–325 | 212 | 17 (8%) |
 Frontier Airlines | 4 | 146–283 | 214 | 10 (5%) |
 American Airlines | 21 | — | 233 | 45 (19%) |
 B6 | 2 | 431–439 | 435 | 28 (6%) |
 United Airlines | 16 | 476–577 | 476 | 43 (9%) |
 Delta Air Lines | 32 | 328–950 | 729 | 45 (6%) |
Where do the best Washington → Denver 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: Washington to Denver flights
- Full-service carriers on Washington–Denver cost 1.8x more than budget airlines (USD 480 vs USD 267 median; overall median USD 325).
- Southwest charges 4.5x more in ancillary fees than F9 — USD 45 vs USD 10 avg per booking.
- The same route priced USD 639 apart depending on where it was booked — the lowest median was USD 205. 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 Washington to Denver cost?
- Based on 116 offers analyzed, Washington to Denver flights range from USD 146 to USD 1037, with a median price of USD 325. Search for your specific dates →
- What hidden fees should I expect on Washington to Denver flights?
- On average, ancillary fees (bags, seat selection) add USD 35 to the base fare on Washington to Denver flights. See itemized fees for your itinerary →
- Which airline is cheapest on Washington to Denver including all fees?
- Southwest has the lowest median fare on Washington to Denver at USD 205 (median across 9 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Washington–Denver 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 205. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Washington to Denver routes?
- Washington to Denver has 7 airlines competing, creating a price range from USD 146 to USD 1037 across 116 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
7 airlines, two price clusters — find which fits your budget
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