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 5% of the time at 8 am and barely half the time at 7 pm.

Nonstops (seasonal or thin)


Alaska	BOS	PDX	6h 21m	79%	1.3%	533	Flying now
JetBlue	BOS	PDX	6h 11m	77%	4.3%	138	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Delta + Alaskatwo ticketsDetails →	BOS 06:05 → SLC 09:18DL 859	3h 28m Salt Lake City	SLC 12:46 → PDX 13:49AS 3117 · flown by SkyWest	10h 44m	99%	90%
United Details →	BOS 07:45 → DEN 10:19UA 647	3h 08m Denver	DEN 13:27 → PDX 15:13UA 2455	10h 28m	100%	89%
Southwest + Alaskatwo ticketsDetails →	BOS 06:25 → DEN 08:50WN 4156	3h 12m Denver	DEN 12:02 → PDX 13:46AS 684	10h 21m	100%	88%
United Details →	BOS 07:28 → SFO 10:55UA 323	4h 00m San Francisco	SFO 14:55 → PDX 16:47UA 2851	12h 19m	100%	88%
Alaska Details →	BOS 07:03 → SEA 10:26AS 459	3h 19m Seattle	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	10h 45m	99%	87%
Delta Details →	BOS 05:55 → MSP 08:04DL 2303	2h 56m Minneapolis	MSP 11:00 → PDX 12:40DL 2167	9h 45m	99%	85%
Southwest Details →	BOS 05:25 → MDW 07:00WN 3239	3h 05m Chicago	MDW 10:05 → PDX 12:25WN 2809	10h 00m	100%	84%
United + Frontiertwo ticketsDetails →	BOS 09:40 → DEN 12:12UA 662	2h 56m Denver	DEN 15:08 → PDX 16:51F9 2553	10h 13m	98%	84%
Tight connection: often missed
Alaska Details →	BOS 17:56 → SEA 21:26AS 304	1h 03m Seattle	SEA 22:29 → PDX 23:30AS 1457	8h 34m	67%	45%
American Details →	BOS 17:05 → PHL 18:49AA 3309	1h 23m Philadelphia	PHL 20:12 → PDX 23:30AA 1483	9h 25m	73%	44%
American Details →	BOS 18:31 → ORD 21:00AA 1554	1h 15m Chicago	ORD 22:15 → PDX 00:50 +1AA 1317	9h 19m	69%	34%

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

DTW · 1h 15m · leaves 05:30 3%

DFW · 1h 18m · leaves 06:00 4%

ORD · 1h 02m · leaves 06:00 5%

Afternoon and evening

SFO · 1h 05m · leaves 18:10 37%

ORD · 55m · leaves 17:00 51%

DEN · 55m · leaves 17:30 79%

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