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 3% of the time at 8 am and 43% of the time at 7 pm.

Nonstops (seasonal or thin)


Alaska	BWI	PDX	5h 45m	85%	0.0%	80	Flying now
Southwest	BWI	PDX	5h 35m	71%	0.0%	120	Flying now

Best connections, one ticket

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 Baltimore). Layovers up to 4 hours. Pick a connection for the details.


United Details →	BWI 08:30 → DEN 10:25UA 2412	3h 02m Denver	DEN 13:27 → PDX 15:13UA 2455	9h 43m	99%	89%
Alaska Details →	BWI 07:03 → SEA 09:53AS 786	3h 52m Seattle	SEA 13:45 → PDX 14:48AS 3204 · flown by SkyWest	10h 45m	100%	86%
United Details →	BWI 06:15 → ORD 07:30UA 709	1h 30m Chicago	ORD 09:00 → PDX 11:38UA 1994	8h 23m	100%	85%
Delta Details →	BWI 06:19 → MSP 07:56DL 2872	3h 04m Minneapolis	MSP 11:00 → PDX 12:40DL 2167	9h 21m	99%	85%
Delta Details →	BWI 06:08 → DTW 07:40DL 2601	1h 14m Detroit	DTW 08:54 → PDX 10:41DL 2171	7h 33m	96%	83%
Southwest Details →	BWI 06:10 → MDW 07:10WN 995	2h 55m Chicago	MDW 10:05 → PDX 12:25WN 2809	9h 15m	98%	83%
United Details →	BWI 06:00 → IAH 08:16UA 1898	1h 14m Houston	IAH 09:30 → PDX 11:56UA 740	8h 56m	97%	81%
Delta Details →	BWI 07:00 → ATL 08:56DL 2579	2h 04m Atlanta	ATL 11:00 → PDX 13:00DL 2206	9h 00m	99%	81%
Tight connection: often missed
United Details →	BWI 18:59 → SFO 21:50UA 504	1h 02m San Francisco	SFO 22:52 → PDX 00:50 +1UA 2384	8h 51m	58%	43%
American Details →	BWI 15:46 → DFW 18:12AA 1629	1h 17m Dallas-Fort Worth	DFW 19:29 → PDX 21:29AA 2298	8h 43m	67%	32%
American Details →	BWI 19:17 → DFW 21:42AA 1626	1h 10m Dallas-Fort Worth	DFW 22:52 → PDX 00:52 +1AA 2620	8h 36m	70%	27%

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

IAH · 1h 14m · leaves 06:00 3%

DTW · 1h 14m · leaves 06:08 4%

ATL · 59m · leaves 05:40 6%

Afternoon and evening

SFO · 1h 02m · leaves 18:59 42%

ORD · 1h 00m · leaves 17:32 43%

LAS · 50m · leaves 18:40 59%

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.


Delta DL 1176 BWI 07:10 → SLC Alaska AS 3117 SLC 12:46 → PDX Connection details →	2h 57m	9h 39m	97%	88%
Southwest WN 275 BWI 09:40 → DEN Frontier F9 2553 DEN 15:08 → PDX Connection details →	3h 43m	10h 13m	100%	86%
Southwest WN 935 BWI 07:25 → DEN Alaska AS 684 DEN 12:02 → PDX Connection details →	2h 47m	9h 21m	98%	86%

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