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$155+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SDF
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
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 March 13, 2026.

This American Airlines deal was found by Cheapflights users on 3/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:01 pm
PWM
-
SDF
1 stop5h 47m
American Airlines
Thu 4/166:31 am
SDF
-
PWM
1 stop4h 44m
American Airlines
Deal found 3/10$337
This Delta deal was found by Cheapflights users on 3/9. 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.
Sun 5/246:02 am
PWM
-
SDF
1 stop7h 39m
Delta
Tue 5/265:30 pm
SDF
-
PWM
1 stop5h 48m
Delta
Deal found 3/9$353
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Sun 5/246:00 am
PWM
-
SDF
1 stop7h 30m
United Airlines
Tue 5/266:00 am
SDF
-
PWM
2 stops7h 25m
United Airlines
Deal found 3/9$368
This Southwest deal was found by Cheapflights users on 3/10. 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.
Tue 4/143:55 pm
PWM
-
SDF
1 stop7h 00m
Southwest
Thu 4/1612:15 pm
SDF
-
PWM
2 stops11h 10m
Southwest
Deal found 3/10$370
This Delta deal was found by Cheapflights users on 3/8. 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.
Thu 8/66:50 pm
PWM
-
SDF
1 stop5h 09m
Delta
Sun 8/96:05 am
SDF
-
PWM
1 stop7h 16m
Delta
Deal found 3/8$387
This Southwest deal was found by Cheapflights users on 3/10. 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.
Sun 5/35:30 am
PWM
-
SDF
1 stop6h 45m
Southwest
Fri 5/84:45 pm
SDF
-
PWM
1 stop6h 40m
Southwest
Deal found 3/10$397
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/29:40 am
PWM
-
SDF
1 stop7h 20m
United Airlines
Tue 5/52:30 pm
SDF
-
PWM
1 stop4h 34m
United Airlines
Deal found 3/11$398
This American Airlines deal was found by Cheapflights users on 3/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:01 pm
PWM
-
SDF
1 stop6h 22m
American Airlines
Sat 5/2312:00 pm
SDF
-
PWM
1 stop5h 07m
American Airlines
Deal found 3/10$400

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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$337
(American Airlines)

One-way from

$155
(United Airlines)

Popular in

August

Cheapest in

June

Average price

$371
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. 22% potential increase in price ($126 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 13, 2026.
Use the filters below to find and compare flights from Portland to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sun 5/24

6:00 am-1:30 pm

1 stop7h 30m

Louisville Intl

Tue 5/26

6:00 am-1:25 pm

2 stops7h 25m

$368

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 4/14

6:10 am-12:40 pm

1 stop6h 30m

Louisville Intl

Thu 4/16

2:40 pm-11:25 pm

2 stops8h 45m

$370

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sun 5/3

5:30 am-12:15 pm

1 stop6h 45m

Louisville Intl

Fri 5/8

4:45 pm-11:25 pm

1 stop6h 40m

$397
Quickest round-trip

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sat 5/2

9:40 am-5:00 pm

1 stop7h 20m

Louisville Intl

Tue 5/5

2:30 pm-7:04 pm

1 stop4h 34m

$398
Cheapest one-way

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 4/7

1:00 pm-10:15 pm

2 stops9h 15m

$165

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Sat 8/8

5:15 am-4:49 pm

2 stops11h 34m

$285
Quickest one-way

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Fri 3/20

4:23 pm-10:13 pm

1 stop5h 50m

$354

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Fri 3/20

5:30 am-3:50 pm

2 stops10h 20m

$364

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 4/7

4:28 pm-2:31 pm

3 stops22h 03m

$470

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Fri 3/20

5:06 pm-3:46 pm

3 stops46h 40m

$619

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Sorted by cheapest first

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Louisville flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 $82). Flying from Portland, Maine to Louisville in March is currently the most expensive (average of $298). 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 March 13, 2026.
Read reviews from past customers who have flown Delta 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
8,285 reviews

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Boarding

8.1

Food

7.2

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
8,285 reviews
Delta
7.9
Good
8,285 reviews

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Boarding

8.1

Food

7.2

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
7.1
Good
11,446 reviews
Delta
7.9
Good
8,285 reviews

Crew

8.5

Entertainment

7.8

Comfort

7.9

Overall

7.9

Boarding

8.1

Food

7.2

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.

  • What airports do I use to fly from Portland to Louisville?

    Booking a flight from Portland (PWM) to Louisville Intl (SDF) is your only option if you wish to fly from Portland to Louisville. On a typical day, there is 1 flight from Portland to Louisville Intl, all of which are around 5h 22m for a nonstop flight. You can also purchase a plane ticket from 2 airlines when you book a flight from Portland to Louisville.

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

    There are many flights that can get you from Portland, Maine to Louisville in 6h 30m. Fly via United Airlines or Southwest 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. Another airline that can offer you cheap pricing is American Airlines. Delta is 42% 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 $82). Flying from Portland, Maine to Louisville in March is currently the most expensive (average of $298). 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 2 airlines flying from Portland to Louisville

Discover the top 2 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 March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$374FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$258Average$374FlexibilityNo cancel feeOn-time71%

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