HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Louisville

$125+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SDF
aug 14 — aug 211
fre 8/14
fre 8/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Louisville with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 juli 15, 2026.

This American Airlines deal was found by Cheapflights users on 7/10. 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.
fre 8/286:02 am
PWM
-
SDF
1 stop4h 38m
American Airlines
ons 9/27:31 am
SDF
-
PWM
1 stop6h 53m
American Airlines
Deal found 7/10$282
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tis 8/252:38 pm
PWM
-
SDF
1 stop4h 37m
United Airlines
ons 8/269:00 am
SDF
-
PWM
1 stop5h 34m
United Airlines
Deal found 7/10$329
This United Airlines deal was found by Cheapflights users on 7/13. 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.
ons 9/3010:43 am
PWM
-
SDF
1 stop6h 57m
United Airlines
fre 10/25:15 am
SDF
-
PWM
1 stop5h 25m
United Airlines
Deal found 7/13$357
This United Airlines deal was found by Cheapflights users on 7/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre 8/285:15 am
PWM
-
SDF
2 stops7h 56m
United Airlines
ons 9/26:00 am
SDF
-
PWM
1 stop4h 04m
United Airlines
Deal found 7/10$367
This Southwest deal was found by Cheapflights users on 7/13. 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.
ons 9/305:45 am
PWM
-
SDF
2 stops10h 35m
Southwest
fre 10/23:35 pm
SDF
-
PWM
1 stop6h 15m
Southwest
Deal found 7/13$386

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 juli 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$249
(Delta)

One-way from

$125
(Southwest)

Popular in

August

Cheapest in

February

Average price

$390
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. 12% potential increase in price ($64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 juli 15, 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

tis 8/25

6:00 am-12:22 pm

1 stop6h 22m

Louisville Intl

ons 8/26

1:56 pm-11:32 pm

2 stops9h 36m

$334

PortlandLouisville

PWM - SDF

PWMSDF

Portland

mån 8/24

6:30 am-1:27 pm

1 stop6h 57m

Louisville Intl

sön 8/30

6:00 am-12:32 pm

1 stop6h 32m

$362

PortlandLouisville

PWM - SDF

PWMSDF

Portland

fre 8/28

6:00 am-7:07 pm

2 stops13h 07m

Louisville Intl

ons 9/2

6:15 am-2:38 pm

2 stops8h 23m

$397

PortlandLouisville

PWM - SDF

PWMSDF

Portland

fre 9/25

6:00 am-2:39 pm

2 stops8h 39m

Louisville Intl

sön 9/27

6:00 am-10:02 am

1 stop4h 02m

$412
Quickest round-trip

PortlandLouisville

PWM - SDF

PWMSDF

Portland

ons 9/16

5:15 am-10:18 am

1 stop5h 03m

Louisville Intl

ons 9/23

1:07 pm-6:29 pm

1 stop5h 22m

$432

PortlandLouisville

PWM - SDF

PWMSDF

Portland

mån 8/10

5:15 am-10:23 am

1 stop5h 08m

Louisville Intl

sön 8/16

10:23 am-5:42 pm

1 stop7h 19m

$439
Cheapest one-way

PortlandLouisville

PWM - SDF

PWMSDF

Portland

lör 9/12

5:40 am-12:40 pm

1 stop7h 00m

$125

PortlandLouisville

PWM - SDF

PWMSDF

Portland

tors 8/20

11:01 am-4:44 pm

1 stop5h 43m

$125

PortlandLouisville

PWM - SDF

PWMSDF

Portland

lör 9/12

6:06 am-12:22 pm

1 stop6h 16m

$125

PortlandLouisville

PWM - SDF

PWMSDF

Portland

tors 8/20

10:30 am-8:25 pm

2 stops9h 55m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/11

Showing 1-10 of 14 resultsSorted by cheapest first
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 July.
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.

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 juli 15, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andAmerican 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
7.8
Good
8,465 reviews

Crew

8.5

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,465 reviews
Delta
7.8
Good
8,465 reviews

Crew

8.5

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,988 reviews
Delta
7.8
Good
8,465 reviews

Crew

8.5

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,808 reviews
Delta
7.8
Good
8,465 reviews

Crew

8.5

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 6h 22m. Fly via United Airlines, Delta, 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 $267. Other airlines that can offer you cheap pricing are United Airlines, from $306, and American Airlines, from $315. Delta is 40% 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.

See more FAQs

Traveling to a place near Louisville?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 juli 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$267Average$390FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$306Average$406FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$315Average$395FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights