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$146+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SDF
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
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 August 20, 2025.

Round-trip from

$292
(American Airlines)

One-way from

$146
(American Airlines)

Popular in

August

Cheapest in

September

Average price

$722
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. 15% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 20, 2025.

This Southwest deal was found by Cheapflights users on 8/18. 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 11/53:30 pmPWM - SDF
1 stop7h 20mSouthwest
Fri 11/75:30 amSDF - PWM
1 stop5h 40mSouthwest
Deal found 8/18$292
This Southwest deal was found by Cheapflights users on 8/18. 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 11/412:45 pmPWM - SDF
2 stops9h 25mSouthwest
Fri 11/75:30 amSDF - PWM
1 stop5h 40mSouthwest
Deal found 8/18$297
This American Airlines deal was found by Cheapflights users on 8/18. 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 9/116:05 pmPWM - SDF
1 stop5h 54mAmerican Airlines
Sun 9/146:12 pmSDF - PWM
1 stop5h 47mAmerican Airlines
Deal found 8/18$299
This American Airlines deal was found by Cheapflights users on 8/18. 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 9/116:05 pmPWM - SDF
1 stop4h 56mAmerican Airlines
Mon 9/153:01 pmSDF - PWM
1 stop5h 42mAmerican Airlines
Deal found 8/18$325
This American Airlines deal was found by Cheapflights users on 8/18. 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 11/215:19 pmPWM - SDF
1 stop4h 11mAmerican Airlines
Mon 11/245:02 pmSDF - PWM
1 stop6h 36mAmerican Airlines
Deal found 8/18$329
This Delta deal was found by Cheapflights users on 8/18. 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.
Fri 11/216:00 amPWM - SDF
1 stop8h 04mDelta
Mon 11/242:59 pmSDF - PWM
2 stops8h 52mDelta
Deal found 8/18$337
This Delta deal was found by Cheapflights users on 8/18. 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.
Fri 12/56:00 amPWM - SDF
1 stop8h 04mDelta
Sun 12/77:20 amSDF - PWM
1 stop4h 31mDelta
Deal found 8/18$367
This American Airlines deal was found by Cheapflights users on 8/18. 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.
Wed 9/102:30 pmPWM - SDF
1 stop7h 00mAmerican Airlines
Mon 9/153:01 pmSDF - PWM
1 stop5h 42mAmerican Airlines
Deal found 8/18$383
This American Airlines deal was found by Cheapflights users on 8/18. 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.
Wed 9/176:00 amPWM - SDF
1 stop4h 41mAmerican Airlines
Mon 9/226:30 pmSDF - PWM
1 stop4h 35mAmerican Airlines
Deal found 8/18$404
This Southwest deal was found by Cheapflights users on 8/18. 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 12/55:30 amPWM - SDF
2 stops9h 15mSouthwest
Sun 12/76:35 amSDF - PWM
2 stops10h 15mSouthwest
Deal found 8/18$407

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 August 20, 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

Wed 11/5

3:30 pm-10:50 pm

1 stop7h 20m

Louisville Intl

Fri 11/7

5:30 am-11:10 am

1 stop5h 40m

$292

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 11/4

12:45 pm-10:50 pm

1 stop10h 05m

Louisville Intl

Fri 11/7

5:30 am-11:10 am

1 stop5h 40m

$297

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 9/11

6:05 pm-11:59 pm

1 stop5h 54m

Louisville Intl

Sun 9/14

6:12 pm-11:59 pm

1 stop5h 47m

$299

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 9/11

6:05 pm-11:01 pm

1 stop4h 56m

Louisville Intl

Mon 9/15

3:01 pm-8:43 pm

1 stop5h 42m

$325

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Wed 9/10

2:30 pm-9:30 pm

1 stop7h 00m

Louisville Intl

Mon 9/15

3:01 pm-8:43 pm

1 stop5h 42m

$383

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Wed 9/17

6:00 am-10:41 am

1 stop4h 41m

Louisville Intl

Mon 9/22

6:30 pm-11:05 pm

1 stop4h 35m

$404

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sat 9/20

6:00 am-10:41 am

1 stop4h 41m

$146

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sat 9/20

6:00 am-11:43 am

1 stop5h 43m

$180

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 9/18

6:05 pm-11:01 pm

1 stop4h 56m

$180

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Fri 9/19

3:28 pm-11:03 pm

1 stop7h 35m

$184

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 14 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 August 20, 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
4,246 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,928 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 5h 54m. Fly via Southwest or American Airlines 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 $270. Other airlines that can offer you cheap pricing are Delta, from $276, and Southwest, from $291. American Airlines is 36% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$270Average$360FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$376FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$291Average$417FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$316Average$496FlexibilityNo cancel feeOn-time69%

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