Denver (DEN) – Houston (IAH)
- Distance
- 1,387 km
- 862 mi · 749 nm
- Flight time
- 2 h 26 min / 2 h 34 min
- Average gate to gate: DEN → IAH / back
- Time difference
- 1 h
- CO2 per passenger
- 174 kg
- One way, economy, incl. RF (103 kg CO2 only)
- Passengers / year
- 1,641,444
- Aug 2025 – Jul 2026 · +0.5%
- Flights / week
- 182
- Both directions, average
- Seats filled
- 84%
- 1,960,065 seats a year
- Airlines nonstop
- 3
- UA, F9, OO
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
- 139°
- Heading from IAH
- 325°
- Halfway point
- 35.01, -99.73
- Great-circle km
- 1,387 km (sphere, for EU261)
- In the air DEN → IAH
- 1 h 54 min
- In the air IAH → DEN
- 2 h 3 min
- Clocks
- Houston is 1 h ahead of Denver
The estimate for a route without real times is 2 h 25 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 137,396 |
| Sep 2025 | 124,209 |
| Oct 2025 | 136,408 |
| Nov 2025 | 129,853 |
| Dec 2025 | 150,599 |
| Jan 2026 | 134,072 |
| Feb 2026 | 126,937 |
| Mar 2026 | 138,956 |
| Apr 2026 | 123,331 |
| May 2026 | 139,953 |
| Jun 2026 | 144,702 |
| Jul 2026 | 155,028 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 807 |
| Sep 2025 | 767 |
| Oct 2025 | 804 |
| Nov 2025 | 713 |
| Dec 2025 | 790 |
| Jan 2026 | 786 |
| Feb 2026 | 705 |
| Mar 2026 | 816 |
| Apr 2026 | 723 |
| May 2026 | 833 |
| Jun 2026 | 862 |
| Jul 2026 | 882 |
Airlines flying DEN–IAH nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| UAUnited Air Lines | 150 | 83% |
| F9Frontier Airlines | 31 | 17% |
| OOSkyWest Airlines | 1.1 | 0% |
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
- Airbus Industrie A321-200n · 4,574 flights
- Boeing 737-900ER · 1,972 flights
- Boeing 757-300 · 908 flights
- Airbus Industrie A320-200n · 625 flights
- Boeing 777-200ER/200LR/233LR · 452 flights
- Boeing B737 Max 900 · 450 flights
- Airbus Industrie A321Neoxlr · 235 flights
- Airbus Industrie A320-100/200 · 82 flights
Also carried: 2,006 tonnes of freight and 64 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 80.7%
- Arrived within 15 min of schedule
- Average delay
- 13 min
- Late arrivals count, early ones as 0
- Cancelled
- 0.3%
- Flights counted
- 9,430
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| UAUnited Air Lines | 80.9% | 13 min |
| F9Frontier Airlines | 80% | 14 min |
Delay minutes by cause: airline 27% · aircraft arriving late 41% · air traffic system 28% · 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
- $238
- One way, all cabins
- Average over a year
- $230
- Q2 2025 – Q1 2026
- Largest airline
- United Air Lines
- 71% of passengers · $280
- Lowest-fare airline
- Frontier Airlines
- 29% of passengers · $131
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q2 2025 $232 · Q3 2025 $222 · Q4 2025 $227 · Q1 2026 $238).
Fare outlook, Q1 2027: about $243, likely $215–$277
The average fare paid we expect a year after Q1 2026, the newest DOT quarter. On this route, past forecasts made this way fell inside the range 86% of the time over 21 quarters (median error 5.2%). An estimate from US DOT data: not a price you can book, not a guarantee, not advice on when to buy. How the outlook works
Cheapest quarter on this route: Q3, typically 3% below the year's average (9 years of DOT data, without 2020–21).
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: 1,387 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 Houston
Kilometres. Linked numbers have a page of their own. All Denver airports · All Houston airports