$99+ Cheap flights from Louisville (SDF) to Delaware
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — ILG
Jun 14 — Jun 211
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Louisville to Delaware with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Louisville to Delaware
Cheapest
Best
Last-minute
One-way
Cheapest flights from Louisville to DelawareExplore the most affordable flight options available from Louisville to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 15, 2026.
Explore the most affordable flight options available from Louisville to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 15, 2026.
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1410:33 am
SDF
- PHL
1 stop8h 14m
American Airlines
Tue 7/148:39 pm
PHL
- SDF
Nonstop2h 25m
American Airlines
Deal found 5/12![American Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:24 pm
SDF
- PHL
1 stop16h 08m
Multiple Airlines
Mon 9/218:48 am
PHL
- SDF
1 stop11h 54m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$316
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:51 am
SDF
- PHL
1 stop9h 59m
American Airlines
Tue 6/98:40 pm
PHL
- SDF
Nonstop2h 28m
American Airlines
Deal found 5/13![American Airlines logo]()
$322
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:28 am
SDF
- PHL
1 stop10h 16m
American Airlines
Fri 8/148:41 pm
PHL
- SDF
Nonstop2h 19m
American Airlines
Deal found 5/13![American Airlines logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:24 pm
SDF
- PHL
1 stop16h 08m
Multiple Airlines
Sun 9/2712:58 pm
PHL
- SDF
1 stop7h 31m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2412:20 pm
SDF
- PHL
1 stop12h 24m
Multiple Airlines
Wed 7/18:43 pm
PHL
- SDF
1 stop13h 49m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:06 pm
SDF
- PHL
1 stop20h 42m
Multiple Airlines
Tue 6/94:36 pm
PHL
- SDF
1 stop16h 00m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/158:06 pm
SDF
- PHL
1 stop27h 23m
Multiple Airlines
Tue 7/214:30 pm
PHL
- SDF
2 stops18h 56m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:10 pm
SDF
- PHL
1 stop18h 32m
Multiple Airlines
Mon 6/85:32 pm
PHL
- SDF
2 stops39h 04m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$335
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:13 am
SDF
- PHL
1 stop9h 37m
American Airlines
Thu 6/48:40 pm
PHL
- SDF
Nonstop2h 28m
American Airlines
Deal found 5/12![American Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/911:12 am
SDF
- PHL
1 stop13h 57m
Multiple Airlines
Mon 7/138:00 am
PHL
- SDF
1 stop11h 58m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$342
Best flights from Louisville to DelawareDiscover carefully curated flight deals from Louisville to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 15, 2026.
Discover carefully curated flight deals from Louisville to Delaware that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 15, 2026.
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:25 pm
SDF
- PHL
1 stop5h 25m
Southwest
Wed 6/1712:55 pm
PHL
- SDF
2 stops8h 45m
Southwest
Deal found 5/11![Southwest logo]()
$376
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:05 pm
SDF
- PHL
1 stop6h 15m
Southwest
Wed 7/221:50 pm
PHL
- SDF
1 stop7h 50m
Southwest
Deal found 5/11![Southwest logo]()
$409
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/291:15 pm
SDF
- PHL
1 stop8h 10m
Southwest
Sun 8/301:35 pm
PHL
- SDF
1 stop6h 35m
Southwest
Deal found 5/12![Southwest logo]()
$417
This Southwest deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2611:55 am
SDF
- PHL
1 stop4h 15m
Southwest
Sun 9/274:05 pm
PHL
- SDF
1 stop7h 40m
Southwest
Deal found 5/11![Southwest logo]()
$417
This Southwest deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:35 pm
SDF
- PHL
2 stops8h 55m
Southwest
Sun 10/42:05 pm
PHL
- SDF
2 stops8h 25m
Southwest
Deal found 5/10![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/283:20 pm
SDF
- PHL
1 stop6h 30m
Southwest
Sun 8/305:45 pm
PHL
- SDF
1 stop4h 30m
Southwest
Deal found 5/12![Southwest logo]()
$437
This Southwest deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:40 am
SDF
- PHL
1 stop7h 10m
Southwest
Sun 10/47:45 am
PHL
- SDF
1 stop5h 25m
Southwest
Deal found 5/10![Southwest logo]()
$437
This Southwest deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/297:25 am
SDF
- PHL
1 stop5h 55m
Southwest
Mon 7/612:50 pm
PHL
- SDF
2 stops9h 35m
Southwest
Deal found 5/15![Southwest logo]()
$442
Last-minute flights from Louisville to DelawareDiscover last-minute flight deals from Louisville to Delaware. Data last updated May 15, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Delaware. Data last updated May 15, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:10 pm
SDF
- PHL
1 stop18h 32m
Multiple Airlines
Mon 6/85:32 pm
PHL
- SDF
2 stops39h 04m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:06 pm
SDF
- PHL
1 stop20h 42m
Multiple Airlines
Tue 6/94:36 pm
PHL
- SDF
1 stop16h 00m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$331
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:13 am
SDF
- PHL
1 stop9h 37m
American Airlines
Thu 6/48:40 pm
PHL
- SDF
Nonstop2h 28m
American Airlines
Deal found 5/12![American Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/46:55 pm
SDF
- PHL
2 stops18h 25m
Multiple Airlines
Tue 6/94:36 pm
PHL
- SDF
1 stop16h 00m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/59:10 pm
SDF
- PHL
2 stops15h 15m
Multiple Airlines
Tue 6/94:36 pm
PHL
- SDF
1 stop16h 00m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/68:06 pm
SDF
- PHL
2 stops16h 19m
Multiple Airlines
Tue 6/94:36 pm
PHL
- SDF
1 stop16h 00m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$348
This American Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:51 am
SDF
- PHL
1 stop9h 59m
American Airlines
Tue 6/98:40 pm
PHL
- SDF
Nonstop2h 28m
American Airlines
Deal found 5/13![American Airlines logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/178:06 pm
SDF
- PHL
1 stop20h 48m
Multiple Airlines
Mon 6/228:43 pm
PHL
- SDF
2 stops35h 53m
Multiple Airlines
Deal found 5/14![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2412:20 pm
SDF
- PHL
1 stop12h 24m
Multiple Airlines
Wed 7/18:43 pm
PHL
- SDF
1 stop13h 49m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$329
One-way flights from Louisville to DelawareSearch for one-way flight options from Louisville to Delaware. Find affordable one-way fares based on user searches. Data last updated May 15, 2026.
Search for one-way flight options from Louisville to Delaware. Find affordable one-way fares based on user searches. Data last updated May 15, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:48 pm
SDF
- PHL
1 stop9h 28m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 5/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1012:20 pm
SDF
- PHL
1 stop27h 17m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:06 pm
SDF
- PHL
2 stops28h 39m
Multiple Airlines
Deal found 5/14![Multiple Airlines logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/81:11 pm
SDF
- PHL
1 stop7h 00m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:10 pm
SDF
- PHL
1 stop18h 34m
Multiple Airlines
Deal found 5/14![Multiple Airlines logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 5/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/89:10 pm
SDF
- PHL
1 stop27h 34m
Multiple Airlines
Deal found 5/14![Multiple Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/41:02 pm
SDF
- PHL
1 stop7h 09m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:24 pm
SDF
- PHL
2 stops17h 53m
Allegiant Air
Deal found 5/13![Allegiant Air logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/59:10 pm
SDF
- PHL
1 stop26h 43m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$155
Find flight deals from Louisville to Delaware
Keep the following information in mind while searching for Louisville to Delaware flight deals. Data was last updated May 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $285 (American Airlines) |
One-way from | $99 (Kiwi.com) |
Popular in | January |
Cheapest in | June |
Average price | $546 |
Cheapflights Fare Finder
Customize your flight search to find flights from Louisville to Delaware that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 15, 2026.
Use the filters below to find and compare flights from Louisville to Delaware that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Wed 6/10
5:25 pm-10:50 pm
1 stop5h 25m
Philadelphia
Wed 6/17
12:55 pm-9:40 pm
2 stops8h 45m
$376
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Fri 7/17
6:05 pm-12:20 am
1 stop6h 15m
Philadelphia
Wed 7/22
1:50 pm-9:40 pm
1 stop7h 50m
$409
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Sat 8/29
1:15 pm-9:25 pm
1 stop8h 10m
Philadelphia
Sun 8/30
1:35 pm-8:10 pm
1 stop6h 35m
$417
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Sat 9/26
11:55 am-4:10 pm
1 stop4h 15m
Philadelphia
Sun 9/27
4:05 pm-11:45 pm
1 stop7h 40m
$417
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Thu 10/1
3:35 pm-12:30 am
2 stops8h 55m
Philadelphia
Sun 10/4
2:05 pm-10:30 pm
2 stops8h 25m
$427
Quickest round-trip
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Fri 8/28
3:20 pm-9:50 pm
1 stop6h 30m
Philadelphia
Sun 8/30
5:45 pm-10:15 pm
1 stop4h 30m
$437
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Fri 10/2
8:40 am-3:50 pm
1 stop7h 10m
Philadelphia
Sun 10/4
7:45 am-1:10 pm
1 stop5h 25m
$437
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Mon 6/29
7:25 am-1:20 pm
1 stop5h 55m
Philadelphia
Mon 7/6
12:50 pm-10:25 pm
2 stops9h 35m
$442
Cheapest one-way
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Tue 8/18
1:15 pm-6:00 pm
1 stop4h 45m
$186
LouisvillePhiladelphia
SDF - PHL
SDFPHL
Louisville Intl
Sun 6/28
6:25 pm-12:10 am
1 stop5h 45m
$219
Showing 1-10 of 17 resultsSorted by cheapest first
Best time to book a flight from Louisville to Delaware
Have a flexible travel schedule? Discover the best time to fly to Delaware from Louisville with our price prediction graph.
SDF-PHL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Louisville to Delaware
SDF-USDE
SDF-PHL
No data available for this route at this time. Please check back soon.
Related info for your journey
Find useful and relevant information for your journey from Louisville to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations