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

The best bet has a stop: United via Denver (6h 36m) reaches Cleveland on time 9 times in 10, against 79% on the nonstop.

Nonstops (seasonal or thin)


Alaska	SEA	CLE	4h 30m	79%	0.7%	455	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


United Details →	SEA 23:11 → ORD 05:18UA 747	3h 47m Chicago	ORD 09:05 → CLE 11:41 +1UA 3422 · flown by Republic	9h 30m	98%	93%
United Details →	SEA 05:15 → SFO 07:35UA 5676 · flown by SkyWest	3h 05m San Francisco	SFO 10:40 → CLE 18:29UA 717	10h 14m	99%	91%
Southwest Details →	SEA 23:05 → MDW 05:00WN 2304	2h 55m Chicago	MDW 07:55 → CLE 10:10 +1WN 4088	8h 05m	98%	91%
United Details →	SEA 05:00 → DEN 08:43UA 2601	57m Denver	DEN 09:40 → CLE 14:36UA 619	6h 36m	95%	91%
Delta Details →	SEA 22:58 → ATL 06:45DL 409	2h 58m Atlanta	ATL 09:43 → CLE 11:32 +1DL 2978	9h 35m	100%	88%
Southwest + Unitedtwo ticketsDetails →	SEA 07:50 → DEN 11:25WN 3397	2h 30m Denver	DEN 13:55 → CLE 18:53UA 2476	8h 03m	98%	88%
Delta Details →	SEA 23:59 → MSP 05:17DL 953	1h 48m Minneapolis	MSP 07:05 → CLE 09:58 +1DL 2847	6h 59m	98%	87%
Delta Details →	SEA 21:45 → ATL 05:36DL 567	1h 49m Atlanta	ATL 07:25 → CLE 09:10 +1DL 1500	8h 25m	97%	87%
Tight connection: often missed
Delta Details →	SEA 23:15 → BOS 07:35DL 473	50m Boston	BOS 08:25 → CLE 10:35 +1DL 5674 · flown by Republic	8h 21m	71%	65%
Delta Details →	SEA 11:15 → BOS 19:43DL 438	1h 02m Boston	BOS 20:45 → CLE 22:59DL 5655 · flown by Republic	8h 44m	65%	39%
American Details →	SEA 10:22 → ORD 16:53AA 2523	46m Chicago	ORD 17:39 → CLE 20:14AA 3466 · flown by Envoy	6h 50m	57%	37%

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 · 57m · leaves 05:00 5%

EWR · 1h 12m · leaves 23:00 8%

IAD · 58m · leaves 23:20 12%

Afternoon and evening

BOS · 1h 02m · leaves 11:15 35%

ORD · 46m · leaves 10:22 43%

DEN · 1h 10m · leaves 14:35 62%

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