King County International Airport - Boeing Field
Seattle, United StatesBFI / KBFI
Regional airport · 63 direct destinations · 2 runways · longest runway 10,007 ft
73 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Seattle → Louisville
BFI
SeattleKing County International Airport - Boeing Field
SeattleKing County International Airport - Boeing FieldSDFLouisvilleLouisville Muhammad Ali International Airport
LouisvilleLouisville Muhammad Ali International Airport- Distance
- 1,941 mi
- Estimated flight time
- ~4h 25m
Louisville is currently 3 hours ahead of Seattle.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 3 flights a day, observed from October 2025 to September 2026.
- 3
- flights per day
- 3
- busiest month · Oct
- 2.5
- quietest month · Dec
- 3 hr 37 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 3Jan2026
- 3Feb
- 3Mar
- 3Apr
- 3May
- 3Jun
- 3Jul
- 3Aug
- 3Sep
- 3Oct2025
- 3Nov
- 2.5Dec
In December 2025 we saw less traffic at Seattle in general than usual; compare that month with care.
Airlines
Who flies it
UPS Airlinesall year
Through the day
Departure times
Local time in Seattle. Most departures between 05:00 and 08:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 0.1Mon
- 2.7Tue
- 2.8Wed
- 2.7Thu
- 3.1Fri
- 2.8Sat
- 1.4Sun
Fleet
Aircraft observed
- Boeing 767-300B76386%
- Boeing 757-200B75211%
- Airbus A300-600A3062%
- McDonnell Douglas MD-11MD111%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 3 | 68 |
|
| February 2026 | 3 | 66 |
|
| March 2026 | 3 | 71 |
|
| April 2026 | 3 | 70 |
|
| May 2026 | 3 | 64 |
|
| June 2026 | 3 | 62 |
|
| July 2026 | 3 | 72 |
|
| August 2026 | 3 | 64 |
|
| September 2026 | 3 | 66 |
|
| October 2025 | 3 | 74 |
|
| November 2025 | 3 | 60 |
|
| December 2025 | 2.5 | 69 |
|
Airlines observed on this route
From observed callsign routes on BFI-SDF - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The 9th longest observed direct route from BFI, out of 63.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Seattle: 63.
- Direct destinations observed from Louisville: 142.
The airports on this route
Louisville Muhammad Ali International Airport
Louisville, United StatesSDF / KSDF
Regional airport · 142 direct destinations · 3 runways · longest runway 11,886 ft
54 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
About the route from Seattle to Louisville
The observed direct connection between King County International Airport - Boeing Field (BFI) and Louisville Muhammad Ali International Airport (SDF) covers approximately 1,941 mi. The estimated flight time is around 4h 25m. UPS Airlines has been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Seattle from Louisville by air?
- The great-circle distance between King County International Airport - Boeing Field and Louisville Muhammad Ali International Airport is approximately 1,941 mi.
- How long is the flight from Seattle to Louisville?
- Based on the distance, the estimated flight time is about 4h 25m. This is an estimate, not a schedule.
- Is there a direct connection from Seattle to Louisville?
- Yes, a direct connection between BFI and SDF has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: UPS Airlines.
- How often is there a flight from Seattle to Louisville?
- On average around 3 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 806 observed flights. Mainly UPS Airlines. That is an observation, not a timetable.
- What is the current time difference between Seattle and Louisville?
- Louisville is currently 3 hours ahead of Seattle.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.