Denver (DEN) – Washington (IAD)
- Distance
- 2,338 km
- 1,452 mi · 1,262 nm
- Flight time
- 3 h 17 min / 3 h 53 min
- Average gate to gate: DEN → IAD / back
- Time difference
- 2 h
- CO2 per passenger
- 293 kg
- One way, economy, incl. RF (173 kg CO2 only)
- Passengers / year
- 1,152,959
- Aug 2025 – Jul 2026 · −5.4%
- Flights / week
- 133
- Both directions, average
- Seats filled
- 85%
- 1,355,122 seats a year
- Airlines nonstop
- 2
- UA, WN
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from DEN
- 84°
- Heading from IAD
- 281°
- Halfway point
- 40.21, -90.97
- Great-circle km
- 2,332 km (sphere, for EU261)
- In the air DEN → IAD
- 2 h 49 min
- In the air IAD → DEN
- 3 h 25 min
- Clocks
- Washington is 2 h ahead of Denver
The estimate for a route without real times is 3 h 35 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 114,386 |
| Sep 2025 | 102,558 |
| Oct 2025 | 93,152 |
| Nov 2025 | 86,452 |
| Dec 2025 | 108,586 |
| Jan 2026 | 83,588 |
| Feb 2026 | 79,926 |
| Mar 2026 | 95,697 |
| Apr 2026 | 93,723 |
| May 2026 | 104,336 |
| Jun 2026 | 94,494 |
| Jul 2026 | 96,061 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 667 |
| Sep 2025 | 588 |
| Oct 2025 | 567 |
| Nov 2025 | 550 |
| Dec 2025 | 610 |
| Jan 2026 | 538 |
| Feb 2026 | 517 |
| Mar 2026 | 595 |
| Apr 2026 | 582 |
| May 2026 | 631 |
| Jun 2026 | 525 |
| Jul 2026 | 533 |
Airlines flying DEN–IAD nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| UAUnited Air Lines | 107 | 84% |
| WNSouthwest Airlines | 26 | 16% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Boeing 737-900ER · 2,082 flights
- Airbus Industrie A321-200n · 1,937 flights
- Boeing B737 Max 800 · 804 flights
- Boeing 757-300 · 572 flights
- Boeing B737 Max 900 · 567 flights
- Boeing 737-800 · 440 flights
- Boeing 777-200ER/200LR/233LR · 309 flights
- Boeing 737-700/700LR/Max 7 · 132 flights
Also carried: 1,275 tonnes of freight and 14 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 82.1%
- Arrived within 15 min of schedule
- Average delay
- 12 min
- Late arrivals count, early ones as 0
- Cancelled
- 0.5%
- Flights counted
- 6,928
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| UAUnited Air Lines | 84.6% | 11 min |
| WNSouthwest Airlines | 72% | 16 min |
Delay minutes by cause: airline 29% · aircraft arriving late 42% · air traffic system 25% · weather 3% · security 0%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
What passengers paid
- Average fare, Q1 2026
- $312
- One way, all cabins
- Average over a year
- $282
- Q2 2025 – Q1 2026
- Largest airline
- United Air Lines
- 81% of passengers · $334
- Lowest-fare airline
- Southwest Airlines
- 18% of passengers · $211
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q2 2025 $272 · Q3 2025 $262 · Q4 2025 $292 · Q1 2026 $312).
U.S. DOT Consumer Airfare Report, Table 1a (airline ticket sample, US domestic airport pairs). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 2,332 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Denver and Washington
Kilometres. Linked numbers have a page of their own. All Denver airports · All Washington airports