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ATIS Alerts Smart Flight Search

Find the flight least likely to be delayed

Beta

We rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.

BWI → IAH

Baltimore to Houston: 1,303 nonstop flights a year

On time (12 months)

79%

Cancelled

1.8%

avg delay 19 min

Best time to leave

Before 9 AM

91% on time vs 68% 6 to 9 PM

Most reliable airline

United

81% chance on time

Check BWI to IAH fares

Lowest nonstop fare seen in the next two months: $102 (Frontier 3067 on 2026-11-26). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Best trips

7 nonstop, 33 with 1 connection. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.

  1. Best overall#1 · Nonstop · 3h 32m

    8:10 AM → 10:42 AM

    91%

    arrive on time

    8:10 AM BWI → 10:42 AM IAH3h 32m

    United 204

    Boeing 737-800 or 737 MAX 9 · 0–27 yrs old
    92% on time · 1.0% cancel
    Find United 204 fares Opens this date on Aviasales

  2. #2 · Nonstop · 3h 35m

    6:05 AM → 8:48 AM

    90%

    arrive on time

    6:05 AM BWI → 8:48 AM IAH3h 35m

    United 1898

    Boeing 737-900 or 737 MAX 8 · 2–25 yrs old
    92% on time · 2.2% cancel
    Find United 1898 fares Opens this date on Aviasales

  3. #3 · Nonstop · 3h 30m

    12:40 PM → 3:09 PM

    88%

    arrive on time

    12:40 PM BWI → 3:09 PM IAH3h 30m

    United 2194

    Boeing 737 MAX 8 · 2–25 yrs old
    89% on time · 0.9% cancel
    Find United 2194 fares Opens this date on Aviasales

  4. #4 · Nonstop · 3h 38m

    5:04 PM → 7:42 PM

    77%

    arrive on time

    5:04 PM BWI → 7:42 PM IAH3h 38m

    United 1362

    Boeing 737-900 · 24–25 yrs old
    78% on time · 1.1% cancel
    Find United 1362 fares Opens this date on Aviasales

  5. #5 · 1 connection · 6h 02m · one ticket (Delta)

    5:40 AM → 10:39 AM

    92%

    connections made

    81%

    arrive on time

    5:40 AM BWI → 7:19 AM DTW1h 37m

    Delta 2601

    Boeing 717 or Airbus A320 · 23–33 yrs old
    93% on time · 2.0% cancel
    Connect in DTW · 1h 16m · 96% chance to make it · same ticket: the airline rebooks you if you miss it

    8:35 AM DTW → 10:39 AM IAH3h 09m

    Delta 1043

    Airbus A320 or A319 · 23–34 yrs old
    88% on time · 1.2% cancel
    Find this Delta trip Look for Delta 2601 + Delta 1043 on Aviasales

  6. #6 · 1 connection · 7h 46m · separate tickets

    6:20 AM → 1:06 PM

    96%

    connections made

    92%

    arrive on time

    6:20 AM BWI → 8:55 AM FLL2h 35m

    Southwest 1132 · also flew as 1500

    Boeing 737 MAX 8 or 737-800 · 1–14 yrs old
    88% on time · 1.0% cancel
    Connect in FLL · 2h 08m · 97% chance to make it · separate tickets: collect and re-check bags, re-clear security; if you miss it the second airline does not have to rebook you

    11:03 AM FLL → 1:06 PM IAH3h 03m

    United 699

    Boeing 737-800 or 737 MAX 8 · 2–27 yrs old
    96% on time · 0.5% cancel
    Flight 1: find Southwest 1132 (BWI–FLL) Flight 2: find United 699 (FLL–IAH) Book each flight separately on Aviasales

  7. #7 · Nonstop · 3h 19m

    11:05 AM → 1:24 PM

    69%

    arrive on time

    11:05 AM BWI → 1:24 PM IAH3h 19m

    Spirit 466

    Airbus A321neo · about 2 yrs old
    70% on time · 2.1% cancel
    Find Spirit 466 fares Opens this date on Aviasales

  8. #8 · 1 connection · 6h 02m · one ticket (Delta)

    5:40 AM → 10:44 AM

    91%

    connections made

    79%

    arrive on time

    5:40 AM BWI → 7:19 AM DTW1h 37m

    Delta 2601

    Boeing 717 or Airbus A320 · 23–33 yrs old
    93% on time · 2.0% cancel
    Connect in DTW · 1h 06m · 94% chance to make it · same ticket: the airline rebooks you if you miss it

    8:25 AM DTW → 10:44 AM IAH3h 19m

    Delta 2158

    Airbus A319 or Boeing 717 · 23–27 yrs old
    87% on time · 1.4% cancel
    Find this Delta trip Look for Delta 2601 + Delta 2158 on Aviasales

  9. #9 · 1 connection · 5h 21m · one ticket (American)

    5:05 AM → 9:26 AM

    90%

    connections made

    77%

    arrive on time

    5:05 AM BWI → 6:36 AM CLT1h 31m

    American 1708 · also flew as 2224

    Boeing 737-800 or Airbus A319 · 8–27 yrs old
    95% on time · 2.2% cancel
    Connect in CLT · 1h 04m · 94% chance to make it · same ticket: the airline rebooks you if you miss it

    7:40 AM CLT → 9:26 AM IAH2h 46m

    American 1930

    Boeing 737-800 · 9–27 yrs old
    85% on time · 1.7% cancel
    Find this American trip Look for American 1708 + American 1930 on Aviasales

  10. #10 · 1 connection · 5h 08m · one ticket (American)

    5:05 AM → 9:13 AM

    86%

    connections made

    76%

    arrive on time

    5:05 AM BWI → 6:36 AM CLT1h 31m

    American 1708 · also flew as 2224

    Boeing 737-800 or Airbus A319 · 8–27 yrs old
    95% on time · 2.2% cancel
    Connect in CLT · 46m · 89% chance to make it · same ticket: the airline rebooks you if you miss it

    7:22 AM CLT → 9:13 AM IAH2h 51m

    American 2134 · also flew as 2445

    Boeing 737 MAX 8 or 737-800 · 1–25 yrs old
    88% on time · 1.5% cancel
    Find this American trip Look for American 1708 + American 2134 on Aviasales

Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes.

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines81%

    803 flights · 82% on time as flown · 1.2% cancel

  • Spirit Airlines74%

    411 flights · 76% on time as flown · 2.3% cancel

  • Frontier Airlines72%

    88 flights · 69% on time as flown · 3.3% cancel

On time by departure time

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

  • Before 9 AM91%

    429 flights · avg delay 9 min

  • 9 AM to noon82%

    133 flights · avg delay 21 min

  • Noon to 3 PM80%

    262 flights · avg delay 16 min

  • 3 to 6 PM69%

    229 flights · avg delay 23 min

  • 6 to 9 PM68%

    233 flights · avg delay 35 min

Best day: Tuesday (83%). Worst: Monday (76%).

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 · 45 mi from your airports · yours: 78%

    Rank flightsFares

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