ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe 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 → MHT
Baltimore to Manchester: 1,710 nonstop flights a year
On time (12 months)
82%
Cancelled
1.2%
avg delay 12 min
Best time to leave
Before 9 AM
96% on time vs 66% after 9 PM
Most reliable airline
Southwest
81% 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 1206
7:00 AM → 8:30 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2699; its record covers all of them.
93%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 95% of the time (111 flights, Jun 2025 to May 2026).
- Never cancelled in 111 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; After 9 PM: 66%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Moderate track record · 111 flights
Find Southwest 1206 fares Opens this date on Aviasales#2 · Southwest 2213
11:10 AM → 12:35 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1942; its record covers all of them.
89%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 92% of the time (87 flights, Jun 2025 to May 2026).
- Never cancelled in 87 scheduled flights.
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Moderate track record · 87 flights
Find Southwest 2213 fares Opens this date on Aviasales#3 · Southwest 1450
12:45 PM → 2:10 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-30.
83%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 88% of the time (8 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).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1450 fares Opens this date on Aviasales#4 · Southwest 1603
3:20 PM → 4:45 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
82%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 85% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 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 (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 1603 fares Opens this date on Aviasales#5 · Southwest 3472
1:10 PM → 2:40 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 2734; its record covers all of them.
82%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 84% of the time (62 flights, Jun 2025 to May 2026).
- Never cancelled in 62 scheduled flights.
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Moderate track record · 62 flights
Find Southwest 3472 fares Opens this date on Aviasales#6 · Southwest 3013
9:35 PM → 11:05 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-30.
81%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (After 9 PM: 66% on time; Before 9 AM: 96%).
- 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 3013 fares Opens this date on Aviasales#7 · Southwest 1209
5:00 PM → 6:30 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
75%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 80% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- 61% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 55 flights
Find Southwest 1209 fares Opens this date on Aviasales#8 · Southwest 1211
10:00 PM → 11:30 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
- On time (history)
- 77%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 77% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Leaves in this route's least on-time window (After 9 PM: 66% on time; Before 9 AM: 96%).
- 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 · 47 flights
Find Southwest 1211 fares Opens this date on Aviasales#9 · Southwest 1050
10:35 PM → 12:05 AM1h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
60%
chance on time
- On time (history)
- 55%
- Cancelled
- 6.1%
- Avg arrival delay
- 26 min
- Arrived on time 55% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 6.1% of the time (2 of 33).
- Leaves in this route's least on-time window (After 9 PM: 66% on time; Before 9 AM: 96%).
- 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 · 31 flights
Find Southwest 1050 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines81%
1,710 flights · 82% on time as flown · 1.2% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
350 flights · avg delay 3 min
- 9 AM to noon91%
323 flights · avg delay 5 min
- Noon to 3 PM83%
218 flights · avg delay 8 min
- 3 to 6 PM76%
317 flights · avg delay 17 min
- 6 to 9 PM72%
232 flights · avg delay 21 min
- After 9 PM66%
270 flights · avg delay 20 min
Best day: Tuesday (84%). Worst: Sunday (70%).
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