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Route on-time record

HOU to BWI: most on-time flights and the best time to fly

Houston (William P. Hobby Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 1,462 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 1.8% were cancelled. The most reliable flight number was Southwest 503 at 5:30 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

HOU → BWI

Houston to Baltimore: 1,462 nonstop flights a year

On time (12 months)

75%

Cancelled

1.8%

avg delay 14 min

Best time to leave

Before 9 AM

92% on time vs 55% 6 to 9 PM

Most reliable airline

Southwest

74% chance on time

Check HOU to BWI fares

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. #1 · Southwest 503

    5:30 AM → 9:30 AM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    90%

    chance on time

    On time (history)
    95%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 95% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 92% on time; 6 to 9 PM: 55%).
    • Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).

    Limited track record · 55 flights

    Find Southwest 503 fares Opens this date on Aviasales

  2. #2 · Southwest 3124

    5:00 AM → 8:50 AM2h 50m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    90%

    chance on time

    On time (history)
    94%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 94% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 92% on time; 6 to 9 PM: 55%).
    • Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).

    Limited track record · 33 flights

    Find Southwest 3124 fares Opens this date on Aviasales

  3. #3 · Southwest 2884

    12:35 PM → 4:35 PM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    80%

    chance on time

    On time (history)
    86%
    Cancelled
    0.0%
    Avg arrival delay
    7 min
    • Arrived on time 86% of the time (66 flights, Jun 2025 to May 2026).
    • Never cancelled in 66 scheduled flights.
    • Departs inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.

    Moderate track record · 66 flights

    Find Southwest 2884 fares Opens this date on Aviasales

  4. #4 · Southwest 2303

    8:05 AM → 12:05 PM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    79%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    11 min
    • Arrived on time 80% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 92% on time; 6 to 9 PM: 55%).
    • Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).

    Limited track record · 55 flights

    Find Southwest 2303 fares Opens this date on Aviasales

  5. #5 · Southwest 2528

    10:15 AM → 2:10 PM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-04-05.

    79%

    chance on time

    On time (history)
    72%
    Cancelled
    0.0%
    Avg arrival delay
    18 min
    • Arrived on time 72% of the time (18 flights, Jun 2025 to May 2026).
    • Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (18 flights), so its score leans on the airline's record at this hour.

    Limited track record · 18 flights

    Find Southwest 2528 fares Opens this date on Aviasales

  6. #6 · Southwest 2902

    7:45 AM → 11:40 AM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    77%

    chance on time

    On time (history)
    67%
    Cancelled
    0.0%
    Avg arrival delay
    15 min
    • Arrived on time 67% of the time (15 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 92% on time; 6 to 9 PM: 55%).
    • Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).
    • Short track record (15 flights), so its score leans on the airline's record at this hour.

    Limited track record · 15 flights

    Find Southwest 2902 fares Opens this date on Aviasales

  7. #7 · Southwest 2304

    5:05 PM → 9:10 PM3h 05m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    74%

    chance on time

    On time (history)
    80%
    Cancelled
    0.0%
    Avg arrival delay
    9 min
    • Arrived on time 80% of the time (55 flights, Jun 2025 to May 2026).
    • Never cancelled in 55 scheduled flights.
    • Departs inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
    • Short track record (55 flights), so its score leans on the airline's record at this hour.

    Limited track record · 55 flights

    Find Southwest 2304 fares Opens this date on Aviasales

  8. #8 · Southwest 496

    7:30 PM → 11:30 PM3h 00m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    58%

    chance on time

    On time (history)
    54%
    Cancelled
    0.0%
    Avg arrival delay
    20 min
    • Arrived on time 54% of the time (46 flights, Jun 2025 to May 2026).
    • Never cancelled in 46 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 55% on time; Before 9 AM: 92%).
    • Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).

    Limited track record · 46 flights

    Find Southwest 496 fares Opens this date on Aviasales

  9. #9 · Southwest 3129

    8:25 PM → 12:15 AM2h 50m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    54%

    chance on time

    On time (history)
    36%
    Cancelled
    0.0%
    Avg arrival delay
    37 min
    • Arrived on time 36% of the time (33 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Leaves in this route's least on-time window (6 to 9 PM: 55% on time; Before 9 AM: 92%).
    • Departs outside HOU's trouble window (noon to 6 PM, when 80% of its 40 ground stops and delay programs started).

    Limited track record · 33 flights

    Find Southwest 3129 fares Opens this date on Aviasales

  10. #10 · Southwest 1615

    5:45 PM → 9:40 PM2h 55m nonstop

    Local times, typical schedule. Last flown 2026-04-06.

    51%

    chance on time

    On time (history)
    19%
    Cancelled
    6.1%
    Avg arrival delay
    39 min
    • Arrived on time 19% of the time (31 flights, Jun 2025 to May 2026).
    • Cancelled 6.1% of the time (2 of 33).
    • Departs inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
    • Short track record (31 flights), so its score leans on the airline's record at this hour.

    Limited track record · 31 flights

    Find Southwest 1615 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Southwest Airlines74%

    1,462 flights · 75% on time as flown · 1.8% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • Before 9 AM92%

    453 flights · avg delay 4 min

  • 9 AM to noon83%

    262 flights · avg delay 9 min

  • Noon to 3 PM73%

    62 flights · avg delay 16 min

  • 3 to 6 PM66%

    354 flights · avg delay 18 min

  • 6 to 9 PM55%

    298 flights · avg delay 26 min

Best day: Tuesday (85%). Worst: Sunday (77%).

Smarter routing

Nearby airports that run more on time

  • IAH → IAD 79% chance on time

    George Bush Intercontinental Airport to Washington Dulles International Airport · 1,862 flights a year · 69 mi from your airports · yours: 74%

    Rank flightsFares

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.

J
87
F
86
M
75
A
80
M
79
J
71
J
76
A
78
S
84
O
80
N
84
D
79

What delays this route

  • Late-arriving aircraft43%
  • Airline (crew, maintenance, boarding)34%
  • Air traffic control and airport volume16%
  • Severe weather6%

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

HOU to BWI questions

What time of day is best to fly HOU to BWI?
Before 9 AM: 92% of flights arrived on time, against 55% for departures 6 to 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 HOU to BWI?
Southwest, with a season-adjusted 74% chance of operating and arriving on time over 1,462 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 HOU to BWI?
June (71% on time); the best was January (87%), 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 HOU

Live status: FAA delays and ground stops