--- title: "Washington to Louisville flights: who flies IAD-SDF" description: "United Airlines flies Washington (IAD) to Louisville (SDF) nonstop about 24 times a week, scheduled at 1h 43m to 1h 56m. See the full timetable and who flies it on 2LNR." canonical: "https://2lnr.com/routes/iad-sdf" url: "https://2lnr.com/routes/iad-sdf.md" date_modified: "2026-10-18T05:10:47Z" --- # Washington to Louisville (IAD-SDF): nonstop flights and who flies them United Airlines flies nonstop between Washington (IAD) and Louisville (SDF), roughly 24 times a week. The timetable below shows the nonstop scheduled at 1h 43m to 1h 56m for the 451 miles. Schedule last confirmed October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 22, 2026. See IAD to SDF on the interactive map [Get started free](https://2lnr.com/login) 24 Flights a week, 4-week average 1h 43m to 1h 56m Scheduled flight time 451 mi Nonstop distance Free To get started ## Washington to Louisville flight schedule Scheduled nonstop departures for IAD to SDF starting October 22, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book. Scheduled nonstop departures from Washington (IAD) to Louisville (SDF) | Date | Flight | Airline | Departs IAD | Arrives SDF | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Thu, Oct 22 | UA 3525 | United Airlines | 08:35 | 10:18 | 1h 43m | [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md) | | Thu, Oct 22 | UA 3980 | United Airlines | 12:55 | 14:39 | 1h 44m | Embraer E175 | | Thu, Oct 22 | UA 6127 | United Airlines | 17:34 | 19:24 | 1h 50m | Embraer E175 | | Fri, Oct 23 | UA 3525 | United Airlines | 08:35 | 10:18 | 1h 43m | Embraer E175 | | Fri, Oct 23 | UA 3980 | United Airlines | 12:55 | 14:39 | 1h 44m | Embraer E175 | | Fri, Oct 23 | UA 6127 | United Airlines | 17:34 | 19:24 | 1h 50m | Embraer E175 | | Sat, Oct 24 | UA 3980 | United Airlines | 12:55 | 14:39 | 1h 44m | Embraer E175 | | Sat, Oct 24 | UA 6127 | United Airlines | 17:34 | 19:24 | 1h 50m | Embraer E175 | | Sun, Oct 25 | UA 3685 | United Airlines | 08:35 | 10:31 | 1h 56m | Embraer E175 | | Sun, Oct 25 | UA 3980 | United Airlines | 12:55 | 14:39 | 1h 44m | Embraer E175 | | Sun, Oct 25 | UA 4055 | United Airlines | 17:20 | 19:15 | 1h 55m | Embraer E175 | | Sun, Oct 25 | UA 3570 | United Airlines | 17:25 | 19:15 | 1h 50m | Embraer E175 | | Mon, Oct 26 | UA 3685 | United Airlines | 08:35 | 10:31 | 1h 56m | Embraer E175 | | Mon, Oct 26 | UA 3980 | United Airlines | 12:55 | 14:39 | 1h 44m | Embraer E175 | | Mon, Oct 26 | UA 4055 | United Airlines | 17:20 | 19:15 | 1h 55m | Embraer E175 | | Mon, Oct 26 | UA 3570 | United Airlines | 17:25 | 19:15 | 1h 50m | Embraer E175 | | Tue, Oct 27 | UA 3980 | United Airlines | 12:55 | 14:39 | 1h 44m | Embraer E175 | | Tue, Oct 27 | UA 3570 | United Airlines | 17:25 | 19:15 | 1h 50m | Embraer E175 | | Tue, Oct 27 | UA 4055 | United Airlines | 17:35 | 19:30 | 1h 55m | Embraer E175 | | Wed, Oct 28 | UA 3980 | United Airlines | 12:55 | 14:39 | 1h 44m | Embraer E175 | | Wed, Oct 28 | UA 3570 | United Airlines | 17:25 | 19:15 | 1h 50m | Embraer E175 | | Wed, Oct 28 | UA 4055 | United Airlines | 17:35 | 19:30 | 1h 55m | Embraer E175 | Showing all 22 scheduled IAD to SDF departures across 7 days with service, starting October 22, 2026. Later dates are on the interactive map. Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure. See every IAD to SDF date on the interactive map ## Aircraft on the Washington to Louisville nonstop United Airlines flies the [Embraer E175](https://2lnr.com/seatmaps/ua/e175.md) on every departure in the schedule table on this page. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure. ## The full IAD to SDF nonstop schedule This page carries the full IAD to SDF nonstop schedule, who operates each departure and how often it runs; the reverse direction is linked below. ### See the schedule Who operates each IAD to SDF nonstop and how often it runs, from 2LNR's schedule data. ### Plan on the map See IAD to SDF on the interactive route map, with schedules, connections, and route statistics. ## Airlines flying Washington to Louisville nonstop Carriers operating IAD to SDF nonstop in the current schedule. - [United Airlines (UA) route map](https://2lnr.com/routes/airlines/ua.md)\ [The aircraft UA flies](https://2lnr.com/seatmaps/ua.md) See IAD to SDF on the interactive map → ## Frequently asked questions about IAD to SDF **How long is the flight from Washington (IAD) to Louisville (SDF)?** Scheduled flight times from Washington (IAD) to Louisville (SDF) run from 1h 43m to 1h 56m across the departures in the schedule table on this page. The nonstop covers about 451 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book. **Which airlines fly nonstop from IAD to SDF?** United Airlines is currently the only airline flying IAD to SDF nonstop. 2LNR doesn't show award or upgrade space for it on IAD to SDF, so this page carries the schedule rather than a space claim. **How many flights a week are there from IAD to SDF?** About 24 nonstop flights a week run between Washington (IAD) and Louisville (SDF) in the current schedule, operated by United Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next. **What time do flights from IAD to SDF depart?** Scheduled IAD to SDF nonstops in the next 7 days with service leave between 08:35 and 17:35, local time at Washington. The schedule table on this page lists every departure by date, with its arrival time and aircraft. **Which flights operate IAD to SDF nonstop?** In the schedule table on this page, IAD to SDF nonstops fly as UA 3525, UA 3570, UA 3685, UA 3980, UA 4055, and UA 6127 on United Airlines. The table lists each departure by date with its times and aircraft. **Does 2LNR show upgrade or award space on IAD to SDF?** Not on this route: 2LNR doesn't show award or upgrade space for United Airlines on IAD to SDF. The page carries the full IAD to SDF nonstop schedule and who flies each departure, and the reverse direction is linked below. Flying the other way? See [SDF to IAD nonstop flights](https://2lnr.com/routes/sdf-iad.md). Award seats rather than schedules? See [award availability by airline](https://2lnr.com/awards.md). Looking beyond this route? See [every route from Washington (IAD)](https://2lnr.com/routes/iad.md), or [every route from Louisville (SDF)](https://2lnr.com/routes/sdf.md). Nonstops to Louisville (SDF) from other airports within 150 miles of Washington (IAD): - [Washington (DCA) to Louisville (SDF)](https://2lnr.com/routes/dca-sdf.md), 23 miles from IAD - [Philadelphia (PHL) to Louisville (SDF)](https://2lnr.com/routes/phl-sdf.md), 134 miles from IAD Nonstops from Washington (IAD) to other airports within 150 miles of Louisville (SDF): - [Washington (IAD) to Owensboro (OWB)](https://2lnr.com/routes/iad-owb.md), 83 miles from SDF - [Washington (IAD) to Cincinnati (CVG)](https://2lnr.com/routes/iad-cvg.md), 84 miles from SDF - [Washington (IAD) to Indianapolis (IND)](https://2lnr.com/routes/iad-ind.md), 111 miles from SDF - [Washington (IAD) to Dayton (DAY)](https://2lnr.com/routes/iad-day.md), 145 miles from SDF Distances are great-circle between the airports, not driving distance. - [How to plan an upgrade by route](https://2lnr.com/guides/upgrade-strategy.md) ## See the full IAD to SDF nonstop schedule Every scheduled departure on this route, with who flies it. 2LNR shows upgrade and award space by date on the carriers it tracks, the next 14 days free on every product and the full horizon on Pro. 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