Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: airlines and hours on this route all land within a few points of 85% on time.

Nonstops


United	TYS	IAD	1h 45m	85%	1.3%	1,266	Flying now
Allegiant	TYS	IAD	1h 44m	91%	1.1%	95	Not flying now

Best connections, one ticket

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 →	TYS 06:00 → ORD 06:59UA 2483	1h 41m Chicago	ORD 08:40 → IAD 11:52UA 2277	5h 52m	97%	89%
Delta Details →	TYS 05:40 → ATL 06:44DL 3015	3h 06m Atlanta	ATL 09:50 → IAD 11:39DL 1444	5h 58m	98%	82%
Delta Details →	TYS 07:35 → ATL 08:46DL 5317 · flown by Endeavor	3h 31m Atlanta	ATL 12:17 → IAD 14:02DL 2135	6h 27m	96%	81%
Delta Details →	TYS 11:41 → DTW 13:25DL 5341 · flown by Endeavor	1h 45m Detroit	DTW 15:10 → IAD 16:42DL 1787	5h 01m	93%	77%
American Details →	TYS 05:00 → CLT 06:23AA 5954 · flown by Piedmont	57m Charlotte	CLT 07:20 → IAD 08:50AA 5219 · flown by PSA	3h 49m	87%	76%
Delta Details →	TYS 10:26 → ATL 11:30DL 1290	3h 29m Atlanta	ATL 14:59 → IAD 16:47DL 1695	6h 21m	100%	76%
United Details →	TYS 10:18 → ORD 11:23UA 4584 · flown by GoJet	2h 07m Chicago	ORD 13:30 → IAD 16:30UA 2794	6h 12m	100%	76%
Delta Details →	TYS 15:54 → ATL 17:05DL 1148	2h 10m Atlanta	ATL 19:15 → IAD 21:03DL 1309	5h 10m	97%	70%
Tight connection: often missed
United Details →	TYS 13:54 → ORD 14:55UA 5617 · flown by SkyWest	58m Chicago	ORD 15:53 → IAD 19:02UA 2437	5h 08m	59%	40%
American Details →	TYS 20:05 → CLT 21:32AA 5957 · flown by Piedmont	1h 13m Charlotte	CLT 22:45 → IAD 00:10 +1AA 1242	4h 05m	69%	26%

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 · 59m · leaves 05:40 6%

CLT · 57m · leaves 05:00 13%

Afternoon and evening

CLT · 1h 13m · leaves 20:05 31%

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.


American AA 3726 TYS 07:15 → ORD United UA 1869 ORD 11:07 → IAD Connection details →	2h 47m	6h 57m	100%	89%
Delta DL 3015 TYS 05:40 → ATL United UA 632 ATL 09:25 → IAD Connection details →	2h 41m	5h 35m	97%	84%
Delta DL 1290 TYS 10:26 → ATL United UA 1831 ATL 14:41 → IAD Connection details →	3h 11m	6h 09m	99%	76%

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