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$224+ Cheap flights from Portland, ME to Louisville (PWM - SDF)

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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SDF
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Portland to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Louisville (SDF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$299
(Kiwi.com)

One-way from

$224
(Southwest)

Popular in

August

Cheapest in

June

Average price

$374
From Portland to Louisville Intl
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One-way flight from Portland to Louisville Intl
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Highest demand for flights based on searches. 17% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Portland to Louisville

Cheapest flights from Portland to Louisville
Explore the most affordable flight options available from Portland to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. 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 12/129:46 amPWM - SDF
1 stop13h 59mMultiple Airlines
Sun 12/142:55 pmSDF - PWM
1 stop19h 46mMultiple Airlines
Deal found 9/16$299
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/215:41 pmPWM - SDF
1 stop5h 19mUnited Airlines
Thu 10/238:30 amSDF - PWM
1 stop5h 23mUnited Airlines
Deal found 9/15$305
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/281:46 pmPWM - SDF
2 stops8h 48mDelta
Thu 11/67:09 amSDF - PWM
1 stop5h 13mDelta
Deal found 9/17$310
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/82:38 pmPWM - SDF
2 stops6h 37mDelta
Tue 11/113:09 pmSDF - PWM
2 stops8h 45mDelta
Deal found 9/17$315
This Southwest deal was found by Cheapflights users on 9/17. 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.
Tue 10/285:45 amPWM - SDF
2 stops10h 35mSouthwest
Thu 11/65:30 amSDF - PWM
1 stop5h 40mSouthwest
Deal found 9/17$316
This American Airlines deal was found by Cheapflights users on 9/16. 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 11/75:37 pmPWM - SDF
1 stop5h 18mAmerican Airlines
Tue 11/114:18 pmSDF - PWM
1 stop5h 17mAmerican Airlines
Deal found 9/16$326
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/237:44 amPWM - SDF
1 stop7h 18mAmerican Airlines
Sun 10/263:35 pmSDF - PWM
1 stop7h 13mAmerican Airlines
Deal found 9/16$350
This United Airlines deal was found by Cheapflights users on 9/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/74:54 pmPWM - SDF
1 stop5h 35mUnited Airlines
Tue 11/112:35 pmSDF - PWM
2 stops8h 42mUnited Airlines
Deal found 9/16$354
This Delta deal was found by Cheapflights users on 9/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:00 amPWM - SDF
1 stop8h 04mDelta
Sun 12/146:35 amSDF - PWM
2 stops9h 31mDelta
Deal found 9/16$355

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Louisville 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 September 17, 2025.
Use the filters below to find and compare flights from Portland to Louisville that are best for you.

Fly from

Portland

Fly to

Louisville

Route

Depart

Return

Price

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 10/28

4:00 pm-10:45 pm

1 stop6h 45m

Louisville Intl

Thu 11/6

5:30 am-11:10 am

1 stop5h 40m

$305

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Wed 11/12

5:37 pm-10:55 pm

1 stop5h 18m

Louisville Intl

Sat 11/15

3:38 pm-10:32 pm

1 stop6h 54m

$305

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sat 11/8

3:15 pm-10:25 pm

1 stop7h 10m

Louisville Intl

Tue 11/11

3:20 pm-10:15 pm

1 stop6h 55m

$305

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sat 11/8

4:48 pm-9:15 pm

1 stop4h 27m

Louisville Intl

Tue 11/11

3:09 pm-11:54 pm

2 stops8h 45m

$310

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Wed 11/12

4:53 pm-9:14 pm

1 stop4h 21m

Louisville Intl

Sat 11/15

10:39 am-10:19 pm

2 stops11h 40m

$310

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 10/28

1:46 pm-10:34 pm

2 stops8h 48m

Louisville Intl

Thu 11/6

7:09 am-12:22 pm

1 stop5h 13m

$310

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Fri 11/7

5:37 pm-10:55 pm

1 stop5h 18m

Louisville Intl

Tue 11/11

4:18 pm-9:35 pm

1 stop5h 17m

$326

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 10/23

7:44 am-3:02 pm

1 stop7h 18m

Louisville Intl

Sun 10/26

3:35 pm-10:48 pm

1 stop7h 13m

$350

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 12/11

6:00 am-2:04 pm

1 stop8h 04m

Louisville Intl

Sun 12/14

3:18 pm-10:17 pm

1 stop6h 59m

$350

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 10/21

3:15 pm-11:00 pm

1 stop7h 45m

Louisville Intl

Thu 10/23

7:00 am-2:33 pm

2 stops7h 33m

$351

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 15 results
1
2

Best time to book a flight from Portland to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Portland with our price prediction graph.
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 Portland to Louisville

What is the cheapest month to book a flight from Portland, Maine to Louisville?

Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Louisville (average of $299). Flying from Portland, Maine to Louisville in April is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Louisville. Reviews last updated September 17, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Portland to Louisville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,961 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Portland to Louisville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland, Maine to Louisville?

    There are many flights that can get you from Portland, Maine to Louisville in 4h 27m. Fly via Southwest, American Airlines, or Delta to get the fastest option. Portland, Maine and Louisville are separated by a distance of 887 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Portland, Maine to Louisville round-trip?

    Cheapflights users have booked flights from Portland, Maine to Louisville round-trip from $248. Other airlines that can offer you cheap pricing are American Airlines, from $270, and United Airlines, from $296. Delta is 42% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Portland, Maine to Louisville one-way?

    $224 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $244 and $338, respectively.

  • Can I find deals for flights from Portland to Louisville that include hotel bookings?

    Yes. In addition to deals on Portland to Louisville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Louisville?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Louisville.

  • Can I find deals for business class flights from Portland to Louisville?

    Yes. Cheapflights offers flight deals from Portland to Louisville by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland, Maine to Louisville?

    Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Louisville (average of $299). Flying from Portland, Maine to Louisville in April is currently the most expensive (average of $369). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Portland to Louisville

Discover the top 4 airlines that operate flights from Portland to Louisville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$369FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$270Average$362FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$296Average$496FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$362Average$532FlexibilityNo cancel feeOn-time63%

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