BWI to IAH flight delays & on-time performance
Nonstop flights from Baltimore/Washington International Thurgood Marshall Airport to George Bush Intercontinental Airport · 1,235 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BWI or IAH right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Baltimore (BWI) to Houston (IAH) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2% were cancelled, and 8% arrived an hour or more late.
- United Airlines was the most punctual airline here (84% on time); Frontier Airlines was the least (61%).
- Departures scheduled around 6am did best (92% on time); around 5pm did worst (58%).
- Thursday was the most reliable day to fly (86% on time) and Monday the least (75%).
- The largest source of delay minutes was air traffic control & airport congestion (36%).
Which airline is most on time from BWI to IAH?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 100% | 0.0% | 0 min | 0.0% | 1 |
| United Airlines | 84% | 1.1% | 12 min | 5.0% | 829 |
| Spirit Airlines | 76% | 2.4% | 25 min | 11.5% | 331 |
| Frontier Airlines | 61% | 6.0% | 38 min | 15.7% | 149 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am81%16 flights
- 6am92%302 flights
- 8am92%86 flights
- 10am88%25 flights
- 11am77%70 flights
- 12pm88%186 flights
- 2pm80%69 flights
- 3pm72%115 flights
- 4pm68%99 flights
- 5pm58%102 flights
- 6pm76%91 flights
- 7pm59%64 flights
- 8pm69%68 flights
- 9pm55%15 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday75%2.5% cancelled
- Tuesday82%1.2% cancelled
- Wednesday81%0.6% cancelled
- Thursday86%0.0% cancelled
- Friday76%3.3% cancelled
- Saturday78%1.9% cancelled
- Sunday77%4.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion36%
- Airline (crew, maintenance, cleaning, fueling)30%
- Late-arriving aircraft30%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather58%
- Airline (crew, maintenance, cleaning, fueling)42%
- Air traffic control & airport congestion0%
- Security0%
BWI to IAH: common questions
- How often are BWI to IAH flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Baltimore to Houston cancelled?
- 2.0% of scheduled flights were cancelled (26 of 1,310).
- How long are typical delays?
- Across all flights the average arrival delay was 18 min (early arrivals count as zero). Flights that were late arrived 86 min behind schedule on average, and 7.8% of flights were an hour or more late.
- How long is taxi time at BWI?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: IAH to BWI — 76% on time
More flights from Baltimore
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BWI → IAH, nonstop flights by US airlines that report to the DOT. How we calculate this.