Houston (IAH) to Baltimore (BWI) flights
United Airlines, Frontier Airlines fly nonstop from George Bush Intercontinental Airport to Baltimore/Washington International Thurgood Marshall Airport, with about 24 flights a week in July 2026. The 1,235-mile flight takes about 3h 2m gate to gate.
- Distance
- 1,235 mi · 1,988 km
- Flight time
- 3h 2m
- Airlines
- 2
- Seats filled
- 80%
Airlines flying IAH to BWI
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| United Airlines | 17 | Boeing 737-800, Boeing 737-900, Boeing 737 MAX 9 | 107,344 | 3h 3m |
| Frontier Airlines | 7 | Airbus A321, Airbus A320neo, Airbus A320-100/200 | 25,680 | 3h 14m |
| Spirit AirlinesCeased operations 2026-05-02 | n/a | Airbus A320-100/200, Airbus A321, Airbus A320neo | 52,883 | 2h 54m |
| Mesa AirlinesSeasonal or ended | n/a | Embraer E175 | 4,638 | 3h 2m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IAH to BWI flight schedule
4 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 7:35am and the last at 6:32pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| UA 604United Airlines | 7:35am | 11:45am | 27 | 91% |
| UA 1720United Airlines | 12:15pm | 4:28pm | 31 | 82% |
| F9 3068Frontier Airlines | 4:19pm | 8:37pm | 31 | 52% |
| UA 1795United Airlines | 6:32pm | 10:45pm | 7 | 56% |
Is IAH to BWI on time?
From September 2025 to August 2026, 78% of 1,368 flights arrived within 15 minutes of schedule and 2% were cancelled. Flights leaving around 7am were the most punctual (91%), those around 4pm the least (40%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (44%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| United Airlines | 893 | 82% | 12 min | 0.9% |
| Spirit Airlines | 295 | 80% | 13 min | 2% |
| Frontier Airlines | 180 | 52% | 36 min | 7.8% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 5am to 6am | 99 | 76% | |
| 6am to 7am | 126 | 83% | |
| 7am to 8am | 251 | 91% | |
| 11am to 12pm | 38 | 84% | |
| 12pm to 1pm | 338 | 87% | |
| 4pm to 5pm | 123 | 40% | |
| 6pm to 7pm | 291 | 69% | |
| 7pm to 8pm | 46 | 72% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 116 | 16,648 | |
| September 2025 | 122 | 15,196 | |
| October 2025 | 128 | 17,260 | |
| November 2025 | 133 | 16,700 | |
| December 2025 | 105 | 14,933 | |
| January 2026 | 112 | 14,718 | |
| February 2026 | 101 | 12,811 | |
| March 2026 | 111 | 15,833 | |
| April 2026 | 120 | 17,579 | |
| May 2026 | 112 | 17,504 | |
| June 2026 | 99 | 15,307 | |
| July 2026 | 106 | 16,315 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.