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

Connect in the morning. The same 75-minute layover misses 3% of the time at 10 am and 23% of the time at 4 pm.

Nonstops


American	STL	DCA	2h 08m	75%	4.3%	1,013	Flying now
Southwest	STL	DCA	2h 00m	74%	1.4%	1,403	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	STL 05:40 → MDW 06:45WN 1008	1h 30m Chicago	MDW 08:15 → DCA 11:10WN 2569	4h 30m	98%	87%
Southwest Details →	STL 05:05 → TPA 08:25WN 3985	1h 20m Tampa	TPA 09:45 → DCA 12:05WN 4016	6h 00m	98%	83%
United Details →	STL 06:00 → ORD 07:30UA 2805	2h 30m Chicago	ORD 10:00 → DCA 13:04UA 1381	6h 04m	97%	83%
Delta Details →	STL 06:21 → MSP 07:57DL 1597	2h 29m Minneapolis	MSP 10:26 → DCA 13:48DL 2983	6h 28m	98%	81%
United Details →	STL 06:14 → IAH 08:31UA 6283 · flown by Mesa	1h 16m Houston	IAH 09:47 → DCA 13:57UA 2670	6h 43m	91%	80%
Delta Details →	STL 06:00 → ATL 08:38DL 1524	2h 22m Atlanta	ATL 11:00 → DCA 12:42DL 737	5h 42m	99%	77%
Delta Details →	STL 06:30 → DTW 09:04DL 1626	1h 01m Detroit	DTW 10:05 → DCA 11:34DL 2476	4h 04m	92%	77%
American Details →	STL 05:30 → DFW 07:29AA 2261	1h 21m Dallas-Fort Worth	DFW 08:50 → DCA 12:52AA 1177	6h 22m	95%	76%
Tight connection: often missed
United Details →	STL 11:25 → ORD 13:03UA 4395 · flown by GoJet	57m Chicago	ORD 14:00 → DCA 17:12UA 1314	4h 47m	68%	36%
Delta Details →	STL 15:57 → MSP 17:40DL 4167 · flown by SkyWest	55m Minneapolis	MSP 18:35 → DCA 22:02DL 2962	5h 05m	53%	33%
American Details →	STL 15:20 → LGA 18:55AA 4509 · flown by Republic	55m New York	LGA 19:50 → DCA 21:26AA 4719 · flown by Republic	5h 06m	67%	31%

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

MCO · 1h 20m · leaves 05:05 0%

TPA · 1h 20m · leaves 05:05 2%

ATL · 1h 15m · leaves 07:08 3%

Afternoon and evening

LGA · 55m · leaves 15:20 33%

IAH · 49m · leaves 14:57 44%

MSP · 55m · leaves 15:57 47%

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 4358 STL 05:05 → MCO American AA 2088 MCO 10:40 → DCA Connection details →	2h 15m	6h 54m	100%	91%
United UA 2805 STL 06:00 → ORD American AA 4809 ORD 10:45 → DCA Connection details →	3h 15m	6h 59m	97%	78%
Southwest WN 4939 STL 05:40 → LGA American AA 4654 LGA 10:47 → DCA Connection details →	1h 47m	5h 37m	96%	78%

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