Travel with Axel,
get the best price.

Philadelphia → Louisville

Dec 28, 2026 · return Dec 29, 2026

PHL → SDF1 adulteconomyRound trip

6 flight options · 4 airlines

One-stop flights

Mon, Dec 28 – Tue, Dec 29

Southwest Airlines
2:55 pmPHL
5h 45m
BNA · 2h 20m
8:40 pmSDF
Southwest Airlines
7:15 pmSDF
4h 35m
BNA · 1h 30m
11:50 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 28 – Tue, Dec 29

American Airlines
3:33 pmPHL
5h 59m
DCA · 2h 33m
9:32 pmSDF
American Airlines
1:14 pmSDF
5h 16m
ORD · 1h 22m
6:30 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 28 – Tue, Dec 29

United Airlines
3:05 pmPHL
4h 25m
IAD · 1h 17m
7:30 pmSDF
United Airlines
9:55 amSDF
4h 19m
IAD · 1h 26m
2:14 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 28 – Tue, Dec 29

Delta Air Lines
12:22 pmPHL
4h 54m
DTW · 1h 36m
5:16 pmSDF
Delta Air Lines
5:56 pmSDF
5h 31m
DTW · 2h 24m
11:27 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 28 – Tue, Dec 29

American Airlines
6:00 amPHL
4h 54m
CLT · 1h 13m
10:54 amSDF
American Airlines
1:14 pmSDF
5h 16m
ORD · 1h 22m
6:30 pmPHL

Round-trip total · 1 adult · Taxes included

Mon, Dec 28 – Tue, Dec 29

American Airlines
8:57 pmPHL
2h 17m
Nonstop
11:14 pmSDF
American Airlines
1:14 pmSDF
5h 16m
ORD · 1h 22m
6:30 pmPHL

Round-trip total · 1 adult · Taxes included

Make this trip yours

PHL ⇄ SDF

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Southwest Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-28 → 2026-12-29Southwest AirlinesWN2080 + WN2154 / WN3814 + WN680$390.002026-10-29T01:56:00Z
2026-12-28 → 2026-12-29American AirlinesAA5437 + AA4672 / AA5316 + AA2840$396.502026-10-29T01:56:00Z
2026-12-28 → 2026-12-29United AirlinesUA4575 + UA4055 / UA4059 + UA4292$416.002026-10-29T01:56:00Z
2026-12-28 → 2026-12-29Delta Air LinesDL2331 + DL5491 / DL5451 + DL2402$429.002026-10-29T01:56:00Z
2026-12-28 → 2026-12-29American AirlinesAA3107 + AA5479 / AA5316 + AA2840$396.502026-10-29T01:56:00Z
2026-12-28 → 2026-12-29American AirlinesAA4697 / AA5316 + AA2840$419.252026-10-29T01:56:00Z

2026-12-28 → 2026-12-29 · $390.00

  • Southwest Airlines WN2080 / WN2154: PHL 2026-12-28 14:55:00 → SDF 2026-12-28 20:40:00; 1 stop(s) via BNA; 345 minutes. Local airport times.
    • WN2080: PHL 2026-12-28 14:55:00 → BNA 2026-12-28 16:10:00; layover at BNA: 140 minutes.
    • WN2154: BNA 2026-12-28 18:30:00 → SDF 2026-12-28 20:40:00.
  • Southwest Airlines WN3814 / WN680: SDF 2026-12-29 19:15:00 → PHL 2026-12-29 23:50:00; 1 stop(s) via BNA; 275 minutes. Local airport times.
    • WN3814: SDF 2026-12-29 19:15:00 → BNA 2026-12-29 19:15:00; layover at BNA: 90 minutes.
    • WN680: BNA 2026-12-29 20:45:00 → PHL 2026-12-29 23:50:00.

2026-12-28 → 2026-12-29 · $396.50

  • American Airlines AA5437 / AA4672: PHL 2026-12-28 15:33:00 → SDF 2026-12-28 21:32:00; 1 stop(s) via DCA; 359 minutes. Local airport times.
    • AA5437: PHL 2026-12-28 15:33:00 → DCA 2026-12-28 16:57:00; layover at DCA: 153 minutes.
    • AA4672: DCA 2026-12-28 19:30:00 → SDF 2026-12-28 21:32:00.
  • American Airlines AA5316 / AA2840: SDF 2026-12-29 13:14:00 → PHL 2026-12-29 18:30:00; 1 stop(s) via ORD; 316 minutes. Local airport times.
    • AA5316: SDF 2026-12-29 13:14:00 → ORD 2026-12-29 13:57:00; layover at ORD: 82 minutes.
    • AA2840: ORD 2026-12-29 15:19:00 → PHL 2026-12-29 18:30:00.

2026-12-28 → 2026-12-29 · $416.00

  • United Airlines UA4575 / UA4055: PHL 2026-12-28 15:05:00 → SDF 2026-12-28 19:30:00; 1 stop(s) via IAD; 265 minutes. Local airport times.
    • UA4575: PHL 2026-12-28 15:05:00 → IAD 2026-12-28 16:18:00; layover at IAD: 77 minutes.
    • UA4055: IAD 2026-12-28 17:35:00 → SDF 2026-12-28 19:30:00.
  • United Airlines UA4059 / UA4292: SDF 2026-12-29 09:55:00 → PHL 2026-12-29 14:14:00; 1 stop(s) via IAD; 259 minutes. Local airport times.
    • UA4059: SDF 2026-12-29 09:55:00 → IAD 2026-12-29 11:33:00; layover at IAD: 86 minutes.
    • UA4292: IAD 2026-12-29 12:59:00 → PHL 2026-12-29 14:14:00.

2026-12-28 → 2026-12-29 · $429.00

  • Delta Air Lines DL2331 / DL5491: PHL 2026-12-28 12:22:00 → SDF 2026-12-28 17:16:00; 1 stop(s) via DTW; 294 minutes. Local airport times.
    • DL2331: PHL 2026-12-28 12:22:00 → DTW 2026-12-28 14:14:00; layover at DTW: 96 minutes.
    • DL5491: DTW 2026-12-28 15:50:00 → SDF 2026-12-28 17:16:00.
  • Delta Air Lines DL5451 / DL2402: SDF 2026-12-29 17:56:00 → PHL 2026-12-29 23:27:00; 1 stop(s) via DTW; 331 minutes. Local airport times.
    • DL5451: SDF 2026-12-29 17:56:00 → DTW 2026-12-29 19:22:00; layover at DTW: 144 minutes.
    • DL2402: DTW 2026-12-29 21:46:00 → PHL 2026-12-29 23:27:00.

2026-12-28 → 2026-12-29 · $396.50

  • American Airlines AA3107 / AA5479: PHL 2026-12-28 06:00:00 → SDF 2026-12-28 10:54:00; 1 stop(s) via CLT; 294 minutes. Local airport times.
    • AA3107: PHL 2026-12-28 06:00:00 → CLT 2026-12-28 07:52:00; layover at CLT: 73 minutes.
    • AA5479: CLT 2026-12-28 09:05:00 → SDF 2026-12-28 10:54:00.
  • American Airlines AA5316 / AA2840: SDF 2026-12-29 13:14:00 → PHL 2026-12-29 18:30:00; 1 stop(s) via ORD; 316 minutes. Local airport times.
    • AA5316: SDF 2026-12-29 13:14:00 → ORD 2026-12-29 13:57:00; layover at ORD: 82 minutes.
    • AA2840: ORD 2026-12-29 15:19:00 → PHL 2026-12-29 18:30:00.

2026-12-28 → 2026-12-29 · $419.25

  • American Airlines AA4697: PHL 2026-12-28 20:57:00 → SDF 2026-12-28 23:14:00; nonstop; 137 minutes. Local airport times.
  • American Airlines AA5316 / AA2840: SDF 2026-12-29 13:14:00 → PHL 2026-12-29 18:30:00; 1 stop(s) via ORD; 316 minutes. Local airport times.
    • AA5316: SDF 2026-12-29 13:14:00 → ORD 2026-12-29 13:57:00; layover at ORD: 82 minutes.
    • AA2840: ORD 2026-12-29 15:19:00 → PHL 2026-12-29 18:30:00.

More dates for this route