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 one-hour layover misses 1 time in 10 at 9 am and 2 times in 5 at 7 pm.

Nonstops


United	IAD	LAX	5h 35m	85%	0.8%	2,338	Flying now
American	IAD	LAX	5h 34m	77%	0.0%	115	Flying now
Alaska	IAD	LAX	5h 29m	47%few flights	0.0%	19	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Los Angeles on time. Total trip = scheduled departure to arrival, layover included (Los Angeles is 3 h behind Dulles). Layovers up to 4 hours. Pick a connection for the details.


United Details →	IAD 06:30 → DEN 08:22UA 2031	1h 40m Denver	DEN 10:02 → LAX 11:34UA 405	8h 04m	100%	91%
United Details →	IAD 08:30 → AUS 10:56UA 637	3h 14m Austin	AUS 14:10 → LAX 15:40UA 5841 · flown by SkyWest	10h 10m	100%	89%
United Details →	IAD 12:55 → MCI 14:45UA 3528 · flown by Republic	1h 41m Kansas City	MCI 16:26 → LAX 18:10UA 5489 · flown by SkyWest	8h 15m	92%	89%
Delta Details →	IAD 06:00 → ATL 07:46DL 2127	3h 44m Atlanta	ATL 11:30 → LAX 13:05DL 326	10h 08m	98%	89%
United Details →	IAD 06:30 → IAH 08:39UA 1935	1h 14m Houston	IAH 09:53 → LAX 11:30UA 469	8h 00m	100%	88%
United Details →	IAD 08:15 → DEN 10:10UA 792	3h 16m Denver	DEN 13:26 → LAX 14:57UA 774	9h 42m	97%	88%
United Details →	IAD 08:40 → IAH 10:59UA 1524	3h 55m Houston	IAH 14:54 → LAX 16:27UA 1945	10h 47m	99%	88%
Alaska Details →	IAD 06:03 → SEA 08:48AS 409	3h 50m Seattle	SEA 12:38 → LAX 15:25AS 502	12h 22m	100%	87%
Tight connection: often missed
Delta Details →	IAD 15:02 → ATL 16:54DL 2135	1h 04m Atlanta	ATL 17:58 → LAX 19:39DL 500	7h 37m	74%	56%
United Details →	IAD 17:42 → EWR 19:10UA 1831	1h 00m Newark	EWR 20:10 → LAX 23:15UA 712	8h 33m	59%	33%
Delta Details →	IAD 12:29 → JFK 13:58DL 5835 · flown by Republic	1h 02m New York	JFK 15:00 → LAX 18:08DL 738	8h 39m	45%	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

ORD · 1h 07m · leaves 10:31 8%

SFO · 1h 07m · leaves 06:30 10%

ATL · 1h 13m · leaves 08:27 10%

Afternoon and evening

SFO · 58m · leaves 12:40 24%

ATL · 56m · leaves 17:51 28%

EWR · 1h 00m · leaves 17:42 41%

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.


United UA 637 IAD 08:30 → AUS Delta DL 946 AUS 13:36 → LAX Connection details →	2h 40m	9h 23m	99%	85%
United UA 2101 IAD 09:00 → SEA Delta DL 2830 SEA 14:55 → LAX Connection details →	3h 04m	11h 40m	100%	84%
United UA 2739 IAD 08:15 → ATL Delta DL 895 ATL 12:35 → LAX Connection details →	2h 21m	9h 00m	96%	84%

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