The nonstop is quickest: Southwest BOS → DAL (4h 10m), on time barely half the time. Southwest via BWI (7h 15m) is more reliable, 84%, but takes 3h 05m longer.
Time of day × airport
Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).
Pick an hour to see this route’s flights leaving then.
Flights, best and worst
Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
No Southwest flight on this route ran 150+ times in the year.
All 1 Southwest flights in the current schedule
Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
| WN 737 | BOS 17:45 | DAL 20:55 | 4h 10m | 58 | 39% | 3.4% | 70 min |
Nonstops by airline and airport
Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
| Southwest | BOS | DAL | 4h 10m | 50% | 0.8% | 260 | Flying now |
Alternatives with one stop
All connections →| SouthwestDetails → | BOS 09:05 → BNA 10:45WN 724 | 1h 35m Nashville | BNA 12:20 → DAL 14:15WN 5046 | 6h 10m | 96% | 82% |
| SouthwestDetails → | BOS 05:30 → BWI 07:05WN 727 | 1h 10m Baltimore | BWI 08:15 → DAL 10:25WN 930 | 5h 55m | 95% | 79% |
| SouthwestDetails → | BOS 07:30 → MDW 09:10WN 745 | 50m Chicago | MDW 10:00 → DAL 12:15WN 1487 | 5h 45m | 88% | 63% |
About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON