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 13% of the time at 11 am and 2 times in 5 at 7 pm.

Nonstops


United	IAD	BNA	2h 05m	83%	0.7%	989	Flying now
Allegiant	IAD	BNA	1h 48m	65%few flights	2.6%	38	Flying now
Southwest	IAD	BNA	–	100%few flights	0.0%	1	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	IAD 08:15 → ORD 09:36UA 1775	2h 53m Chicago	ORD 12:29 → BNA 14:14UA 3634 · flown by Republic	6h 59m	100%	88%
United Details →	IAD 06:10 → ORD 07:27UA 2070	1h 13m Chicago	ORD 08:40 → BNA 10:34UA 5304 · flown by SkyWest	5h 24m	95%	86%
Delta Details →	IAD 06:00 → ATL 07:46DL 2127	3h 35m Atlanta	ATL 11:21 → BNA 11:33DL 2867	6h 33m	98%	84%
Delta Details →	IAD 08:27 → ATL 10:17DL 3080	3h 34m Atlanta	ATL 13:51 → BNA 14:00DL 3159	6h 33m	98%	75%
Delta Details →	IAD 11:44 → MSP 13:39DL 3699 · flown by SkyWest	1h 50m Minneapolis	MSP 15:29 → BNA 17:35DL 2612	6h 51m	95%	74%
American Details →	IAD 06:33 → CLT 08:00AA 1216	3h 20m Charlotte	CLT 11:20 → BNA 12:02AA 5082 · flown by PSA	6h 29m	97%	73%
American Details →	IAD 05:03 → CLT 06:35AA 5054 · flown by PSA	2h 30m Charlotte	CLT 09:05 → BNA 09:49AA 5083 · flown by PSA	5h 46m	94%	73%
United Details →	IAD 06:33 → EWR 07:52UA 2147	3h 03m Newark	EWR 10:55 → BNA 12:18UA 1616	6h 45m	100%	73%
Tight connection: often missed
United Details →	IAD 12:35 → EWR 14:01UA 1498	59m Newark	EWR 15:00 → BNA 16:32UA 1608	4h 57m	69%	46%
United Details →	IAD 15:39 → ORD 17:02UA 1393	56m Chicago	ORD 17:58 → BNA 19:44UA 2784	5h 05m	53%	31%
United Details →	IAD 17:42 → ORD 18:50UA 2497	1h 07m Chicago	ORD 19:57 → BNA 21:45UA 2063	5h 03m	59%	28%

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

EWR · 1h 00m · leaves 08:29 11%

IAH · 56m · leaves 08:40 13%

ATL · 1h 04m · leaves 08:27 14%

Afternoon and evening

IAH · 1h 09m · leaves 12:50 13%

DEN · 1h 01m · leaves 14:35 17%

ORD · 1h 07m · leaves 17:42 41%

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 1998 IAD 08:45 → MSP Delta DL 2843 MSP 12:55 → BNA Connection details →	2h 27m	7h 15m	98%	86%
United UA 6137 IAD 08:35 → DTW Delta DL 1557 DTW 12:25 → BNA Connection details →	2h 11m	5h 31m	92%	80%
United UA 2244 IAD 09:00 → SAV Southwest WN 2076 SAV 13:15 → BNA Connection details →	2h 23m	5h 40m	96%	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