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 70-minute layover misses 3% of the time at 7 am and 28% of the time at 8 pm.

Nonstops


Frontier	DEN	GEG	2h 25m	87%	0.0%	110	Flying now
United	DEN	GEG	2h 34m	80%	0.4%	1,084	Flying now
Southwest	DEN	GEG	2h 22m	72%	0.2%	857	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Alaska Details →	DEN 06:02 → SEA 08:05AS 643	1h 50m Seattle	SEA 09:55 → GEG 11:00AS 2200 · flown by Horizon	5h 58m	97%	88%
Delta Details →	DEN 05:40 → SLC 07:13DL 2544	1h 02m Salt Lake City	SLC 08:15 → GEG 09:07DL 4444 · flown by SkyWest	4h 27m	89%	87%
Delta Details →	DEN 06:00 → MSP 08:59DL 1129	3h 18m Minneapolis	MSP 12:17 → GEG 13:18DL 2437	8h 18m	98%	85%
United Details →	DEN 05:15 → SFO 06:53UA 2367	1h 17m San Francisco	SFO 08:10 → GEG 10:27UA 6014 · flown by SkyWest	6h 12m	97%	85%
Alaska Details →	DEN 12:02 → PDX 13:46AS 684	3h 44m Portland	PDX 17:30 → GEG 18:44AS 3052 · flown by SkyWest	7h 42m	100%	83%
Delta Details →	DEN 13:15 → SEA 15:23DL 1358	2h 36m Seattle	SEA 17:59 → GEG 19:17DL 3832 · flown by SkyWest	7h 02m	98%	83%
Delta Details →	DEN 12:45 → SLC 14:18DL 1553	3h 12m Salt Lake City	SLC 17:30 → GEG 18:14DL 1024	6h 29m	99%	82%
Alaska Details →	DEN 18:15 → SEA 20:17AS 249	2h 37m Seattle	SEA 22:54 → GEG 23:59AS 350	6h 44m	94%	79%
Tight connection: often missed
United Details →	DEN 17:54 → SFO 19:40UA 1007	1h 05m San Francisco	SFO 20:45 → GEG 23:04UA 5693 · flown by SkyWest	6h 10m	72%	49%
Alaska Details →	DEN 19:05 → PDX 20:50AS 1807	1h 00m Portland	PDX 21:50 → GEG 22:59AS 1356	4h 54m	58%	48%
Southwest Details →	DEN 19:25 → SMF 20:55WN 136	55m Sacramento	SMF 21:50 → GEG 23:35WN 2805	5h 13m	2%	1%

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

SFO · 1h 17m · leaves 05:15 3%

SLC · 1h 02m · leaves 05:40 11%

SEA · 49m · leaves 06:30 17%

Afternoon and evening

SFO · 1h 05m · leaves 17:54 28%

PDX · 1h 00m · leaves 19:05 42%

SMF · 55m · leaves 19:25 98%

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 1667 DEN 09:35 → PDX Alaska AS 3262 PDX 14:30 → GEG Connection details →	3h 20m	7h 06m	100%	100%
United UA 1638 DEN 08:00 → LAX Delta DL 3794 LAX 13:06 → GEG Connection details →	3h 34m	8h 48m	100%	93%
Southwest WN 3051 DEN 10:05 → SEA Delta DL 3857 SEA 15:40 → GEG Connection details →	3h 35m	7h 52m	100%	93%

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