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

No clear winner: Southwest’s BWI → JAX flights land within a few points of 77% on time whatever the hour.

Nonstops


Southwest	BWI	JAX	2h 05m	77%	1.6%	1,401	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Jacksonville on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


American Details →	BWI 06:03 → ORD 07:30AA 3889 · flown by Envoy	1h 30m Chicago	ORD 09:00 → JAX 12:41AA 4740 · flown by Republic	6h 38m	96%	86%
Delta Details →	BWI 05:40 → ATL 07:31DL 2950	1h 59m Atlanta	ATL 09:30 → JAX 10:43DL 2356	5h 03m	98%	83%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	1h 52m Atlanta	ATL 10:48 → JAX 12:00DL 2923	5h 00m	98%	81%
Delta Details →	BWI 08:17 → ATL 10:15DL 2562	3h 42m Atlanta	ATL 13:57 → JAX 15:07DL 2990	6h 51m	99%	78%
Delta Details →	BWI 06:17 → BOS 08:00DL 5813 · flown by Republic	55m Boston	BOS 08:55 → JAX 11:49DL 5597 · flown by Republic	5h 32m	94%	76%
Delta Details →	BWI 09:39 → DTW 11:07DL 2341	3h 56m Detroit	DTW 15:03 → JAX 17:27DL 2994	7h 48m	98%	76%
Delta Details →	BWI 06:08 → DTW 07:40DL 2601	49m Detroit	DTW 08:29 → JAX 10:49DL 2333	4h 41m	90%	75%
United Details →	BWI 08:16 → ORD 09:30UA 2749	1h 12m Chicago	ORD 10:42 → JAX 14:27UA 2427	6h 11m	95%	75%
Tight connection: often missed
United Details →	BWI 15:03 → IAH 17:19UA 2095	56m Houston	IAH 18:15 → JAX 21:41UA 4035 · flown by Mesa	6h 38m	62%	48%
American Details →	BWI 18:39 → MIA 21:25AA 1619	1h 28m Miami	MIA 22:53 → JAX 00:15 +1AA 416	5h 36m	74%	37%

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

BOS · 55m · leaves 06:17 6%

ATL · 54m · leaves 05:40 9%

DTW · 49m · leaves 06:08 10%

Afternoon and evening

ATL · 1h 11m · leaves 18:24 23%

IAH · 56m · leaves 15:03 38%

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.


Southwest WN 4689 BWI 06:20 → ATL Delta DL 2923 ATL 10:48 → JAX Connection details →	2h 33m	5h 40m	100%	85%
Southwest WN 3931 BWI 08:20 → ATL Delta DL 2990 ATL 13:57 → JAX Connection details →	3h 37m	6h 48m	98%	79%
Frontier F9 2633 BWI 06:35 → ATL Delta DL 3024 ATL 12:33 → JAX Connection details →	3h 33m	7h 08m	98%	76%

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