Skip to content

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Your shortcuts, saved on this device. Search to add an airport.

No airports saved yet. Add the fields you visit most.

Ask ATIS

Route on-time record

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

Denver (Denver International Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 2,925 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 1.3% were cancelled. The most reliable flight number was Southwest 1808 at 5:45 AM.

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

DEN → BWI

Denver to Baltimore: 2,925 nonstop flights a year

On time (12 months)

77%

Cancelled

1.3%

avg delay 13 min

Best time to leave

Before 9 AM

91% on time vs 46% 6 to 9 PM

Most reliable airline

United

80% chance on time

Check DEN 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 1808

    5:45 AM → 11:10 AM3h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 1627; its record covers all of them.

    92%

    chance on time

    On time (history)
    100%
    Cancelled
    5.6%
    Avg arrival delay
    1 min
    • Arrived on time 100% of the time (34 flights, Jun 2025 to May 2026).
    • Cancelled 5.6% of the time (2 of 36).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 46%).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).

    Limited track record · 34 flights

    Find Southwest 1808 fares Opens this date on Aviasales

  2. #2 · Southwest 982

    5:15 AM → 10:40 AM3h 25m nonstop

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

    92%

    chance on time

    On time (history)
    97%
    Cancelled
    0.0%
    Avg arrival delay
    2 min
    • Arrived on time 97% of the time (32 flights, Jun 2025 to May 2026).
    • Never cancelled in 32 scheduled flights.
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 46%).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).

    Limited track record · 32 flights

    Find Southwest 982 fares Opens this date on Aviasales

  3. #3 · Southwest 333

    5:30 AM → 10:55 AM3h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-30. Same departure also flew as Southwest 3261; its record covers all of them.

    90%

    chance on time

    On time (history)
    93%
    Cancelled
    0.0%
    Avg arrival delay
    3 min
    • Arrived on time 93% of the time (28 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 46%).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
    • Short track record (28 flights), so its score leans on the airline's record at this hour.

    Limited track record · 28 flights

    Find Southwest 333 fares Opens this date on Aviasales

  4. #4 · United 1418

    9:46 AM → 3:17 PM3h 31m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1362; its record covers all of them.

    88%

    chance on time

    On time (history)
    89%
    Cancelled
    0.5%
    Avg arrival delay
    6 min
    • Arrived on time 89% of the time (359 flights, Jun 2025 to May 2026).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 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.

    Strong track record · 359 flights

    Find United 1418 fares Opens this date on Aviasales

  5. #5 · Southwest 1813

    11:55 PM → 5:20 AM3h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2476; its record covers all of them.

    85%

    chance on time

    On time (history)
    88%
    Cancelled
    0.0%
    Avg arrival delay
    4 min
    • Arrived on time 88% of the time (86 flights, Jun 2025 to May 2026).
    • Never cancelled in 86 scheduled flights.
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).

    Moderate track record · 86 flights

    Find Southwest 1813 fares Opens this date on Aviasales

  6. #6 · Southwest 3324

    7:45 AM → 1:10 PM3h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1096; its record covers all of them.

    84%

    chance on time

    On time (history)
    88%
    Cancelled
    1.4%
    Avg arrival delay
    6 min
    • Arrived on time 88% of the time (73 flights, Jun 2025 to May 2026).
    • Leaves in this route's most on-time window (Before 9 AM: 91% on time; 6 to 9 PM: 46%).
    • Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).

    Moderate track record · 73 flights

    Find Southwest 3324 fares Opens this date on Aviasales

  7. #7 · Southwest 3309

    2:45 PM → 8:00 PM3h 15m nonstop

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

    74%

    chance on time

    On time (history)
    73%
    Cancelled
    0.0%
    Avg arrival delay
    21 min
    • Arrived on time 73% of the time (30 flights, Jun 2025 to May 2026).
    • Never cancelled in 33 scheduled flights.
    • Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
    • Short track record (30 flights), so its score leans on the airline's record at this hour.

    Limited track record · 30 flights

    Find Southwest 3309 fares Opens this date on Aviasales

  8. #8 · United 709

    5:48 PM → 11:24 PM3h 36m nonstop

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

    69%

    chance on time

    On time (history)
    70%
    Cancelled
    1.4%
    Avg arrival delay
    19 min
    • Arrived on time 70% of the time (358 flights, Jun 2025 to May 2026).
    • Departs inside DEN's trouble window: 79% of its 174 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.

    Strong track record · 358 flights

    Find United 709 fares Opens this date on Aviasales

  9. #9 · Southwest 2125

    2:15 PM → 7:40 PM3h 25m nonstop

    Local times, typical schedule. Last flown 2026-05-29.

    64%

    chance on time

    On time (history)
    54%
    Cancelled
    0.0%
    Avg arrival delay
    22 min
    • Arrived on time 54% of the time (39 flights, Jun 2025 to May 2026).
    • Never cancelled in 39 scheduled flights.
    • Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
    • Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 39 flights

    Find Southwest 2125 fares Opens this date on Aviasales

  10. #10 · Southwest 2272

    7:40 PM → 12:55 AM3h 15m nonstop

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

    48%

    chance on time

    On time (history)
    45%
    Cancelled
    0.0%
    Avg arrival delay
    29 min
    • Arrived on time 45% 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: 46% on time; Before 9 AM: 91%).
    • Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.

    Limited track record · 33 flights

    Find Southwest 2272 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • United Airlines80%

    931 flights · 81% on time as flown · 0.8% cancel

  • Frontier Airlines75%

    77 flights · 70% on time as flown · 0.9% cancel

  • Southwest Airlines74%

    1,917 flights · 75% 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%

    597 flights · avg delay 4 min

  • 9 AM to noon84%

    635 flights · avg delay 9 min

  • Noon to 3 PM73%

    449 flights · avg delay 15 min

  • 3 to 6 PM63%

    644 flights · avg delay 23 min

  • 6 to 9 PM46%

    188 flights · avg delay 36 min

  • After 9 PM85%

    412 flights · avg delay 7 min

Best day: Wednesday (81%). Worst: Sunday (73%).

Smarter routing

Nearby airports that run more on time

  • DEN → DCA 80% chance on time

    Denver International Airport to Ronald Reagan Washington National Airport · 1,350 flights a year · 30 mi from your airports · yours: 76%

    Rank flightsFares

  • DEN → IAD 79% chance on time

    Denver International Airport to Washington Dulles International Airport · 3,622 flights a year · 45 mi from your airports · yours: 76%

    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
77
F
79
M
80
A
81
M
72
J
67
J
66
A
70
S
79
O
84
N
83
D
79

What delays this route

  • Late-arriving aircraft49%
  • Airline (crew, maintenance, boarding)30%
  • Air traffic control and airport volume19%
  • Severe weather1%

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

DEN to BWI questions

What time of day is best to fly DEN to BWI?
Before 9 AM: 91% of flights arrived on time, against 46% 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 DEN to BWI?
United, with a season-adjusted 80% chance of operating and arriving on time over 931 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 DEN to BWI?
July (66% on time); the best was October (84%), 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 DEN

Live status: FAA delays and ground stops