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

No clear winner: American’s DFW → BIL flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


American	DFW	BIL	2h 59m	81%	0.9%	691	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


American Details →	DFW 05:00 → ORD 07:38AA 1360	2h 27m Chicago	ORD 10:05 → BIL 12:23AA 3428 · flown by Envoy	8h 19m	95%	91%
Alaska Details →	DFW 16:16 → SEA 18:37AS 1580	2h 22m Seattle	SEA 20:59 → BIL 23:51AS 2457 · flown by Horizon	8h 35m	100%	91%
Delta Details →	DFW 12:30 → SLC 14:25DL 2798	2h 08m Salt Lake City	SLC 16:33 → BIL 18:00DL 3828 · flown by SkyWest	6h 30m	98%	85%
United Details →	DFW 08:45 → DEN 10:06UA 644	3h 39m Denver	DEN 13:45 → BIL 15:29UA 5845 · flown by SkyWest	7h 44m	100%	83%
United Details →	DFW 05:45 → DEN 06:53UA 773	1h 02m Denver	DEN 07:55 → BIL 09:36UA 4762 · flown by SkyWest	4h 51m	95%	81%
American + Unitedtwo ticketsDetails →	DFW 07:04 → DEN 08:08AA 1523	3h 37m Denver	DEN 11:45 → BIL 13:22UA 703	7h 18m	98%	78%
American + Alaskatwo ticketsDetails →	DFW 10:47 → SEA 13:08AA 717	2h 41m Seattle	SEA 15:49 → BIL 18:42AS 2353 · flown by Horizon	8h 55m	94%	75%
Alaska Details →	DFW 06:24 → SEA 08:45AS 543	1h 24m Seattle	SEA 10:09 → BIL 13:05AS 2054 · flown by Horizon	7h 41m	92%	74%
Tight connection: often missed
United Details →	DFW 16:50 → DEN 18:20UA 1303	1h 20m Denver	DEN 19:40 → BIL 21:17UA 1417	5h 27m	70%	55%
United Details →	DFW 18:45 → DEN 20:15UA 1602	55m Denver	DEN 21:10 → BIL 22:54UA 5257 · flown by SkyWest	5h 09m	67%	53%
Delta Details →	DFW 18:31 → MSP 21:00DL 2873	1h 15m Minneapolis	MSP 22:15 → BIL 23:30DL 2941	5h 59m	62%	48%

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

DEN · 1h 02m · leaves 05:45 5%

Afternoon and evening

DEN · 55m · leaves 18:45 33%

MSP · 1h 15m · leaves 18:31 38%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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