IAH to DCA flight delays
IAH DCA George Bush to Ronald Reagan Washington · 1,208 miles
7,556 flights were scheduled from IAH to DCA over July 2023 through June 2026. Of the 7,392 that made the trip, 76.7% reached the gate less than 15 minutes behind schedule. These are arrival figures: “on time” means the flight reached the gate less than 15 minutes behind schedule. Arrivals are what decide whether you make the connection, so route and airline pages are scored on them rather than on pushback.
Data through June 2026 · Bureau of Transportation Statistics
The route in brief
- Flights in the window
- 7,556
- Arrived on time
- 76.7%
- Cancelled
- 1.7%
- Scheduled distance
- 1,208 miles
Cancellations are counted against everything scheduled. Diverted flights are counted with them rather than as very late arrivals, which is why the on-time share and the cancellation rate do not add up to everything that happened.
Airline by airline
Airlines with at least 100 flights on IAH–DCA, busiest first. Same route, same weather, same air traffic — which makes this the fairest comparison on the site.
| Airline | Arrived on time | Typical delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 76.9% | 70 min | 1.3% | 6,694 |
| Republic Airways | 75.9% | 64 min | 4.9% | 513 |
| PSA Airlines | 69% | 109 min | 5.1% | 276 |
Month by month
June was the month to avoid on IAH–DCA: 66% of flights arrived on time, against 83.8% in January. Each bar pools three years of that calendar month.
| Month | Share flights that arrived on time | Flights |
|---|---|---|
| January | 83.8% | 643 |
| February | 74.1% | 628 |
| March | 75.9% | 681 |
| April | 80.2% | 661 |
| May | 71.5% | 663 |
| June | 66% | 634 |
| July | 66.6% | 540 |
| August | 73.2% | 549 |
| September | 80.2% | 612 |
| October | 82.8% | 654 |
| November | 81.2% | 659 |
| December | 82.2% | 632 |
Both ends of the route
A route’s record is built out of two airports’ habits. The hour-by-hour grid for each is on its own page.
IAH to DCA in one number
IAH → DCA
When a flight on this route was late, it was late by about 72 min.
Questions about IAH to DCA
- Which airline is most reliable from IAH to DCA?
- United Airlines — its flights on this pairing arrived on time 76.9% of the time, with 6,694 scheduled. PSA Airlines came in at 69% over 276 scheduled. Airlines with fewer than 100 flights on the route are not rated.
- What is the worst month to fly IAH to DCA?
- June, at 66% of arrivals on time, with 634 flights scheduled. January was the best of the year at 83.8%.
- How late are IAH–DCA flights when they are late?
- 72 min on average, counting only the flights that arrived 15 minutes or more behind schedule. The on-time flights are left out of that average on purpose — mixing them in would flatter it.
- How often is the IAH to DCA flight cancelled?
- 1.7% of scheduled flights on this route were cancelled, July 2023 through June 2026. Diverted flights are counted with the cancellations rather than as late arrivals.
- Are these departure or arrival numbers?
- Arrival. A flight counts as on time here if it reached the gate at DCA less than 15 minutes behind schedule. Airport pages score departures instead, because that is the number you can act on when you pick a booking time.