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$198+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SDF
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
1 adult, Economy
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Cheap 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 December 8, 2025.

This American Airlines deal was found by Cheapflights users on 12/7. 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 12/259:30 amPWM - SDF
1 stop5h 42mAmerican Airlines
Thu 1/13:44 pmSDF - PWM
1 stop7h 07mAmerican Airlines
Deal found 12/7$412
This United Airlines deal was found by Cheapflights users on 12/7. 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.
Thu 12/256:00 amPWM - SDF
2 stops11h 28mUnited Airlines
Thu 1/13:44 pmSDF - PWM
1 stop7h 38mUnited Airlines
Deal found 12/7$434
This American Airlines deal was found by Cheapflights users on 12/7. 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.
Sat 12/205:39 amPWM - SDF
1 stop5h 15mAmerican Airlines
Mon 12/296:03 amSDF - PWM
1 stop5h 46mAmerican Airlines
Deal found 12/7$653
This Delta deal was found by Cheapflights users on 12/8. 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.
Mon 12/154:43 pmPWM - SDF
1 stop5h 18mDelta
Thu 12/183:16 pmSDF - PWM
1 stop7h 07mDelta
Deal found 12/8$697
This United Airlines deal was found by Cheapflights users on 12/7. 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.
Sat 12/207:08 pmPWM - SDF
2 stops19h 36mUnited Airlines
Mon 12/293:44 pmSDF - PWM
1 stop7h 38mUnited Airlines
Deal found 12/7$713
This United Airlines deal was found by Cheapflights users on 12/8. 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 12/237:30 pmPWM - SDF
1 stop23h 41mUnited Airlines
Sat 12/279:55 amSDF - PWM
1 stop14h 04mUnited Airlines
Deal found 12/8$797
This American Airlines deal was found by Cheapflights users on 12/7. 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 12/115:17 pmPWM - SDF
2 stops7h 05mAmerican Airlines
Sat 12/1311:15 amSDF - PWM
1 stop10h 27mAmerican Airlines
Deal found 12/7$821

Find 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 December 8, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$328
(American Airlines)

One-way from

$198
(Kiwi.com)

Popular in

August

Cheapest in

June

Average price

$378
Provider with most accurate pricing for Portland-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Louisville Intl flights.
Search Deals
From Portland to Louisville Intl
Search Deals
One-way flight from Portland to Louisville Intl
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($109 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 8, 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

Fri 1/16

5:20 am-10:38 am

1 stop5h 18m

Louisville Intl

Sun 1/18

4:32 pm-11:43 pm

1 stop7h 11m

$328

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 2/17

5:31 am-10:26 am

1 stop4h 55m

Louisville Intl

Mon 2/23

5:11 pm-11:51 pm

1 stop6h 40m

$329

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Wed 2/4

5:20 am-10:38 am

1 stop5h 18m

Louisville Intl

Sun 2/8

4:32 pm-11:43 pm

1 stop7h 11m

$352

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 1/13

4:10 pm-10:30 pm

1 stop6h 20m

Louisville Intl

Thu 1/15

8:30 am-1:56 pm

1 stop5h 26m

$356

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Wed 2/4

2:35 pm-11:50 pm

2 stops9h 15m

Louisville Intl

Sun 2/8

5:00 pm-11:22 pm

1 stop6h 22m

$357

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 2/5

12:43 pm-8:56 pm

2 stops8h 13m

Louisville Intl

Sun 2/8

7:50 am-12:03 pm

1 stop4h 13m

$369

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 1/27

11:12 am-7:31 pm

1 stop8h 19m

Louisville Intl

Wed 1/28

6:28 am-1:56 pm

1 stop7h 28m

$387

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Fri 12/19

6:05 pm-11:59 pm

2 stops29h 54m

$198

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Fri 12/19

6:08 am-12:13 pm

1 stop6h 05m

$270

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sat 12/20

11:16 am-11:59 pm

2 stops12h 43m

$270

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/5

Showing 1-10 of 14 results
1
2

Compare providers for flights from Portland to Louisville

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Louisville in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-Louisville flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-Louisville flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland, Maine-Louisville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-Louisville flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-Louisville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, May is the cheapest month in which you can book a flight from Portland, Maine to Louisville (average of $110). Flying from Portland, Maine to Louisville in March is currently the most expensive (average of $256). 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 December 8, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American 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.
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,013 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,076 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,042 reviews
Delta
7.9
Good
8,013 reviews

Comfort

7.9

Boarding

8.1

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 18m. Fly via American Airlines to get the fastest option. Portland, Maine and Louisville are separated by a distance of 887 mi.

  • 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 $153. Other airlines that can offer you cheap pricing are American Airlines, from $270, and United Airlines, from $316. Delta is 63% 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, May is the cheapest month in which you can book a flight from Portland, Maine to Louisville (average of $110). Flying from Portland, Maine to Louisville in March is currently the most expensive (average of $256). 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

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Top 3 airlines flying from Portland to Louisville

Discover the top 3 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 December 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$379FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$270Average$370FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$316Average$399FlexibilityNo cancel feeOn-time69%

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