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 90-minute layover misses 6% of the time at 8 am and 32% of the time at 7 pm.

Nonstops


United	IAD	PHX	5h 10m	87%	0.8%	730	Flying now
Southwest	IAD	PHX	5h 10m	73%	0.7%	306	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	IAD 07:00 → LAX 09:26UA 325	3h 39m Los Angeles	LAX 13:05 → PHX 14:42UA 5450 · flown by SkyWest	10h 42m	100%	97%
United Details →	IAD 15:15 → LAX 17:47UA 684	3h 35m Los Angeles	LAX 21:22 → PHX 22:59UA 5458 · flown by SkyWest	10h 44m	100%	93%
United Details →	IAD 06:10 → ORD 07:27UA 2070	1h 35m Chicago	ORD 09:02 → PHX 11:03UA 2225	7h 53m	95%	88%
United Details →	IAD 06:33 → EWR 07:52UA 2147	3h 32m Newark	EWR 11:24 → PHX 13:39UA 370	10h 06m	100%	88%
United Details →	IAD 06:30 → DEN 08:22UA 2031	3h 03m Denver	DEN 11:25 → PHX 12:25UA 1686	8h 55m	100%	87%
United Details →	IAD 08:40 → IAH 10:59UA 1524	3h 21m Houston	IAH 14:20 → PHX 15:10UA 1238	9h 30m	99%	85%
United Details →	IAD 06:30 → IAH 08:39UA 1935	1h 01m Houston	IAH 09:40 → PHX 10:34UA 1895	7h 04m	100%	85%
United Details →	IAD 08:15 → ORD 09:36UA 1775	3h 54m Chicago	ORD 13:30 → PHX 15:19UA 455	10h 04m	100%	85%
Tight connection: often missed
Alaska Details →	IAD 06:03 → SEA 08:48AS 409	1h 11m Seattle	SEA 09:59 → PHX 13:01AS 593	9h 58m	74%	53%
Delta Details →	IAD 15:02 → ATL 16:54DL 2135	1h 05m Atlanta	ATL 17:59 → PHX 18:53DL 836	6h 56m	74%	53%
United Details →	IAD 17:42 → EWR 19:10UA 1831	1h 14m Newark	EWR 20:24 → PHX 22:46UA 1814	8h 04m	68%	41%

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

LAX · 1h 19m · leaves 06:11 12%

DTW · 1h 05m · leaves 06:00 13%

SFO · 53m · leaves 06:30 19%

Afternoon and evening

LAX · 1h 01m · leaves 17:48 28%

EWR · 1h 14m · leaves 17:42 32%

DFW · 1h 09m · leaves 19:31 45%

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 1689 IAD 13:10 → LAX Delta DL 4077 LAX 17:41 → PHX Connection details →	1h 59m	9h 05m	96%	84%
United UA 1734 IAD 08:15 → LAX Delta DL 3894 LAX 13:48 → PHX Connection details →	3h 01m	10h 08m	96%	83%
United UA 2031 IAD 06:30 → DEN American AA 1757 DEN 12:15 → PHX Connection details →	3h 53m	9h 38m	100%	82%

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