Route on-time record
BWI to HOU: most on-time flights and the best time to fly
Baltimore (Baltimore/Washington International Thurgood Marshall Airport) to Houston (William P. Hobby Airport). 1,464 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 1.6% were cancelled. The most reliable flight number was Southwest 1144 at 7:15 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BWI → HOU
Baltimore to Houston: 1,464 nonstop flights a year
On time (12 months)
76%
Cancelled
1.6%
avg delay 14 min
Best time to leave
Before 9 AM
91% on time vs 60% after 9 PM
Most reliable airline
Southwest
75% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Southwest 1144
7:15 AM → 9:40 AM3h 25m nonstop
Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 1759; its record covers all of them.
83%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 84% of the time (56 flights, Jun 2025 to May 2026).
- Never cancelled in 56 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; After 9 PM: 60%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Limited track record · 56 flights
Find Southwest 1144 fares Opens this date on Aviasales#2 · Southwest 3437
8:45 AM → 11:20 AM3h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 91% on time; After 9 PM: 60%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3437 fares Opens this date on Aviasales#3 · Southwest 2008
10:20 AM → 12:45 PM3h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 82% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
Limited track record · 55 flights
Find Southwest 2008 fares Opens this date on Aviasales#4 · Southwest 3949
12:35 PM → 3:00 PM3h 25m nonstop
Local times, typical schedule. Last flown 2026-05-27. Same departure also flew as Southwest 3436; its record covers all of them.
75%
chance on time
- On time (history)
- 73%
- Cancelled
- 2.0%
- Avg arrival delay
- 15 min
- Arrived on time 73% of the time (48 flights, Jun 2025 to May 2026).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
- Short track record (48 flights), so its score leans on the airline's record at this hour.
Limited track record · 48 flights
Find Southwest 3949 fares Opens this date on Aviasales#5 · Southwest 3791
5:45 PM → 8:20 PM3h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06. Same departure also flew as Southwest 3884; its record covers all of them.
71%
chance on time
- On time (history)
- 67%
- Cancelled
- 3.6%
- Avg arrival delay
- 29 min
- Arrived on time 67% of the time (27 flights, Jun 2025 to May 2026).
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- 50% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (27 flights), so its score leans on the airline's record at this hour.
Limited track record · 27 flights
Find Southwest 3791 fares Opens this date on Aviasales#6 · Southwest 562
9:40 PM → 12:05 AM3h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.0%
- Avg arrival delay
- 20 min
- Arrived on time 70% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's least on-time window (After 9 PM: 60% on time; Before 9 AM: 91%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Limited track record · 54 flights
Find Southwest 562 fares Opens this date on Aviasales#7 · Southwest 1526
9:05 PM → 11:40 PM3h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06.
66%
chance on time
- On time (history)
- 66%
- Cancelled
- 3.0%
- Avg arrival delay
- 27 min
- Arrived on time 66% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Leaves in this route's least on-time window (After 9 PM: 60% on time; Before 9 AM: 91%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Limited track record · 32 flights
Find Southwest 1526 fares Opens this date on Aviasales#8 · Southwest 3547
6:25 PM → 8:55 PM3h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
57%
chance on time
- On time (history)
- 46%
- Cancelled
- 0.0%
- Avg arrival delay
- 25 min
- Arrived on time 46% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (54 flights), so its score leans on the airline's record at this hour.
Limited track record · 54 flights
Find Southwest 3547 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines75%
1,464 flights · 76% on time as flown · 1.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
356 flights · avg delay 4 min
- 9 AM to noon83%
270 flights · avg delay 9 min
- Noon to 3 PM77%
158 flights · avg delay 16 min
- 3 to 6 PM73%
213 flights · avg delay 17 min
- 6 to 9 PM62%
321 flights · avg delay 20 min
- After 9 PM60%
146 flights · avg delay 27 min
Best day: Tuesday (79%). Worst: Sunday (72%).
Smarter routing
Nearby airports that run more on time
IAD → IAH 82% chance on time
Washington Dulles International Airport to George Bush Intercontinental Airport · 1,865 flights a year · 69 mi from your airports · yours: 75%
DCA → IAH 80% chance on time
Ronald Reagan Washington National Airport to George Bush Intercontinental Airport · 3,113 flights a year · 54 mi from your airports · yours: 75%
BWI → IAH 78% chance on time
Baltimore/Washington International Thurgood Marshall Airport to George Bush Intercontinental Airport · 1,303 flights a year · 24 mi from your airports · yours: 75%
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft41%
- Airline (crew, maintenance, boarding)36%
- Air traffic control and airport volume19%
- Severe weather4%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
BWI to HOU questions
- What time of day is best to fly BWI to HOU?
- Before 9 AM: 91% of flights arrived on time, against 60% for departures after 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from BWI to HOU?
- Southwest, with a season-adjusted 75% chance of operating and arriving on time over 1,464 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on BWI to HOU?
- July (55% on time); the best was November (88%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from BWI
- HOU to BWI (return)
- BWI to ATL 79%
- BWI to MCO 75%
- BWI to BOS 74%
- BWI to FLL 75%
- BWI to CLT 80%
- BWI to DEN 76%
- BWI to TPA 79%
- BWI to ORD 75%
- BWI to MIA 74%
- BWI to DTW 81%
- BWI to PVD 78%
- BWI to BNA 80%
Live status: FAA delays and ground stops