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

No clear winner: airlines and hours on this route all land within a few points of 82% on time.

Nonstops (seasonal or thin)


Southwest	SLC	BWI	4h 05m	85%	1.0%	409	Flying now
Delta	SLC	BWI	4h 09m	78%	1.7%	360	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Baltimore on time. Total trip = scheduled departure to arrival, layover included (Baltimore is 2 h ahead of Salt Lake City). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SLC 06:05 → SFO 07:19UA 4763 · flown by SkyWest	2h 14m San Francisco	SFO 09:33 → BWI 17:57UA 2664	9h 52m	98%	89%
Delta Details →	SLC 23:35 → ATL 05:15DL 912	3h 40m Atlanta	ATL 08:55 → BWI 10:47 +1DL 801	9h 12m	100%	88%
United Details →	SLC 05:15 → DEN 06:54UA 5683 · flown by SkyWest	2h 52m Denver	DEN 09:46 → BWI 15:17UA 1362	8h 02m	99%	87%
Delta Details →	SLC 23:50 → DTW 05:19DL 2841	1h 51m Detroit	DTW 07:10 → BWI 08:44 +1DL 2341	6h 54m	91%	84%
American Details →	SLC 23:25 → CLT 05:22AA 2611	2h 38m Charlotte	CLT 08:00 → BWI 09:26 +1AA 1635	8h 01m	96%	83%
Alaska Details →	SLC 06:23 → SEA 07:35AS 1444	1h 28m Seattle	SEA 09:03 → BWI 17:04AS 378	8h 41m	97%	81%
United Details →	SLC 05:10 → ORD 09:41UA 5635 · flown by SkyWest	1h 10m Chicago	ORD 10:51 → BWI 13:57UA 2653	6h 47m	100%	81%
Delta Details →	SLC 06:00 → DTW 11:23DL 2289	3h 46m Detroit	DTW 15:09 → BWI 16:45DL 2480	8h 45m	100%	79%
Tight connection: often missed
Delta Details →	SLC 09:55 → ATL 15:41DL 835	46m Atlanta	ATL 16:27 → BWI 18:23DL 2928	6h 26m	68%	47%
Southwest Details →	SLC 14:05 → MDW 18:05WN 3750	55m Chicago	MDW 19:00 → BWI 21:55WN 2745	5h 50m	50%	31%
Southwest Details →	SLC 16:45 → DEN 18:15WN 3740	50m Denver	DEN 19:05 → BWI 00:35 +1WN 1500	5h 48m	18%	5%

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

MDW · 1h 05m · leaves 06:55 0%

IAH · 1h 19m · leaves 06:45 4%

DEN · 1h 04m · leaves 07:00 4%

Afternoon and evening

LAS · 1h 15m · leaves 20:30 40%

MDW · 55m · leaves 14:05 50%

DEN · 50m · leaves 16:45 82%

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.


Delta DL 696 SLC 23:31 → BOS Southwest WN 732 BOS 08:55 → BWI Connection details →	2h 50m	8h 59m	99%	89%
Delta DL 2069 SLC 23:36 → MCO Southwest WN 2611 MCO 08:40 → BWI Connection details →	2h 40m	9h 19m	98%	88%
Delta DL 2077 SLC 23:36 → TPA Frontier F9 4092 TPA 08:15 → BWI Connection details →	2h 30m	9h 08m	98%	88%

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