Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

The nonstop is quickest: Southwest BOS → DAL (4h 10m), on time barely half the time. Delta via Atlanta (6h 54m) is more reliable, 89%, but takes 2h 44m longer.

Nonstops (seasonal or thin)


Southwest	BOS	DAL	4h 10m	50%	0.8%	260	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Dallas on time. Total trip = scheduled departure to arrival, layover included (Dallas is 1 h behind Boston). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	BOS 05:30 → ATL 08:15DL 2242	2h 00m Atlanta	ATL 10:15 → DAL 11:24DL 1115	6h 54m	100%	89%
Southwest Details →	BOS 05:30 → BWI 07:05WN 727	2h 30m Baltimore	BWI 09:35 → DAL 11:45WN 931	7h 15m	96%	84%
Delta Details →	BOS 08:05 → ATL 10:49DL 923	3h 10m Atlanta	ATL 13:59 → DAL 15:03DL 512	8h 07m	98%	82%
Southwest Details →	BOS 09:05 → BNA 10:45WN 724	1h 35m Nashville	BNA 12:20 → DAL 14:15WN 5046	6h 10m	96%	82%
Delta Details →	BOS 15:10 → ATL 18:10DL 638	3h 05m Atlanta	ATL 21:15 → DAL 22:34DL 1104	8h 24m	96%	76%
Delta Details →	BOS 10:20 → ATL 13:04DL 385	3h 34m Atlanta	ATL 16:38 → DAL 17:55DL 2780	8h 35m	99%	73%
Southwest Details →	BOS 05:25 → MDW 07:00WN 3239	3h 00m Chicago	MDW 10:00 → DAL 12:15WN 1487	7h 50m	100%	73%
Southwest Details →	BOS 06:25 → DEN 08:50WN 4156	1h 15m Denver	DEN 10:05 → DAL 13:10WN 1518	7h 45m	95%	69%
Tight connection: often missed
Southwest Details →	BOS 17:20 → BWI 19:10WN 1898	50m Baltimore	BWI 20:00 → DAL 22:10WN 693	5h 50m	44%	17%
Southwest Details →	BOS 18:50 → STL 20:55WN 754	55m St Louis	STL 21:50 → DAL 23:30WN 3904	5h 40m	35%	10%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

DEN · 1h 15m · leaves 06:25 5%

BWI · 1h 10m · leaves 05:30 5%

MDW · 50m · leaves 07:30 12%

Afternoon and evening

BWI · 50m · leaves 17:20 56%

STL · 55m · leaves 18:50 65%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


JetBlue B6 1097 BOS 08:30 → ATL Delta DL 512 ATL 13:59 → DAL Connection details →	2h 43m	7h 42m	93%	77%
JetBlue B6 897 BOS 14:50 → ATL Delta DL 1104 ATL 21:15 → DAL Connection details →	3h 36m	8h 44m	93%	72%
American AA 4424 BOS 06:00 → LGA Southwest WN 2451 LGA 09:35 → DAL Connection details →	2h 11m	7h 15m	98%	72%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

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