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 15% of the time at 8 am and 58% of the time at 7 pm.

Nonstops


United	IAD	BOS	1h 40m	78%	2.5%	1,514	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	IAD 06:33 → CLT 08:00AA 1216	3h 18m Charlotte	CLT 11:18 → BOS 13:33AA 1611	7h 00m	97%	85%
American Details →	IAD 05:03 → CLT 06:35AA 5054 · flown by PSA	2h 20m Charlotte	CLT 08:55 → BOS 11:08AA 1533	6h 05m	94%	85%
United Details →	IAD 06:10 → ORD 07:27UA 2070	1h 48m Chicago	ORD 09:15 → BOS 12:57UA 1117	6h 47m	95%	82%
United Details →	IAD 08:29 → EWR 09:55UA 2396	2h 04m Newark	EWR 11:59 → BOS 13:16UA 1669	4h 47m	99%	81%
Delta Details →	IAD 06:00 → ATL 07:46DL 2127	2h 14m Atlanta	ATL 10:00 → BOS 12:44DL 855	6h 44m	97%	81%
Delta Details →	IAD 06:00 → DTW 07:40DL 3826 · flown by SkyWest	2h 25m Detroit	DTW 10:05 → BOS 12:05DL 2648	6h 03m	96%	79%
Delta Details →	IAD 06:00 → MSP 07:55DL 3996 · flown by SkyWest	2h 10m Minneapolis	MSP 10:05 → BOS 13:51DL 2655	7h 55m	95%	75%
United Details →	IAD 06:33 → EWR 07:52UA 2147	2h 08m Newark	EWR 10:00 → BOS 11:16UA 375	4h 43m	100%	74%
Tight connection: often missed
United Details →	IAD 08:15 → ORD 09:36UA 1775	49m Chicago	ORD 10:25 → BOS 14:04UA 1606	5h 47m	69%	56%
United Details →	IAD 17:42 → EWR 19:10UA 1831	1h 15m Newark	EWR 20:25 → BOS 21:53UA 2058	4h 11m	69%	39%
American Details →	IAD 13:08 → CLT 14:42AA 5220 · flown by PSA	1h 03m Charlotte	CLT 15:45 → BOS 18:04AA 1552	4h 56m	74%	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

ORD · 1h 00m · leaves 10:31 8%

ATL · 49m · leaves 06:00 15%

CLT · 55m · leaves 06:33 23%

Afternoon and evening

ATL · 1h 11m · leaves 19:35 17%

EWR · 1h 15m · leaves 17:42 31%

ORD · 55m · leaves 17:42 58%

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.


United UA 2112 IAD 08:30 → ORF Delta DL 5809 ORF 11:55 → BOS Connection details →	2h 16m	5h 18m	99%	88%
United UA 2147 IAD 06:33 → EWR Delta DL 5764 EWR 09:30 → BOS Connection details →	1h 38m	4h 22m	91%	82%
United UA 4615 IAD 08:25 → ROC American AA 4171 ROC 12:00 → BOS Connection details →	2h 08m	5h 01m	94%	80%

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