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 90-minute layover misses 5% of the time at 9 am and 15% of the time at 5 pm.

Nonstops (seasonal or thin)


United	SDF	IAD	1h 41m	88%	0.8%	888	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


United Details →	SDF 07:15 → ORD 07:56UA 3422 · flown by Republic	3h 11m Chicago	ORD 11:07 → IAD 14:12UA 1869	6h 57m	99%	87%
Delta Details →	SDF 08:10 → ATL 09:40DL 2299	2h 37m Atlanta	ATL 12:17 → IAD 14:02DL 2135	5h 52m	98%	83%
American + Unitedtwo ticketsDetails →	SDF 05:04 → CLT 06:41AA 5255 · flown by PSA	3h 46m Charlotte	CLT 10:27 → IAD 11:55UA 4012 · flown by Mesa	6h 51m	96%	82%
Delta Details →	SDF 06:00 → ATL 07:25DL 2407	2h 25m Atlanta	ATL 09:50 → IAD 11:39DL 1444	5h 38m	98%	82%
Delta Details →	SDF 10:35 → DTW 12:06DL 3821 · flown by SkyWest	3h 04m Detroit	DTW 15:10 → IAD 16:42DL 1787	6h 07m	98%	80%
United Details →	SDF 10:04 → ORD 10:40UA 5629 · flown by SkyWest	2h 50m Chicago	ORD 13:30 → IAD 16:30UA 2794	6h 26m	100%	76%
Delta + Unitedtwo ticketsDetails →	SDF 06:00 → LGA 08:15DL 5652 · flown by Republic	2h 14m New York	LGA 10:29 → IAD 11:55UA 6242 · flown by Mesa	5h 55m	97%	73%
United Details →	SDF 09:30 → IAH 10:58UA 6326 · flown by Mesa	1h 15m Houston	IAH 12:13 → IAD 16:30UA 2366	7h 00m	91%	73%
Tight connection: often missed
United Details →	SDF 14:10 → ORD 14:50UA 5603 · flown by SkyWest	1h 03m Chicago	ORD 15:53 → IAD 19:02UA 2437	4h 52m	59%	40%
Delta Details →	SDF 17:55 → MSP 19:09DL 5017 · flown by Endeavor	46m Minneapolis	MSP 19:55 → IAD 23:25DL 4129 · flown by SkyWest	5h 30m	45%	34%
American Details →	SDF 15:39 → CLT 17:24AA 5397 · flown by PSA	46m Charlotte	CLT 18:10 → IAD 19:34AA 1450	4h 01m	60%	29%

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

ATL · 1h 16m · leaves 07:05 6%

IAH · 1h 15m · leaves 09:30 9%

CLT · 1h 11m · leaves 08:15 13%

Afternoon and evening

ORD · 1h 00m · leaves 19:55 23%

CLT · 46m · leaves 15:39 40%

MSP · 46m · leaves 17:55 55%

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