HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Louisville

$239+ 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SDF
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
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.

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 November 17, 2025.

This American Airlines deal was found by Cheapflights users on 11/14. 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 12/512:23 pmPWM - SDF
1 stop9h 15mAmerican Airlines
Sun 12/76:08 amSDF - PWM
1 stop10h 22mAmerican Airlines
Deal found 11/14$367
This Delta deal was found by Cheapflights users on 11/14. 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 12/24:53 pmPWM - SDF
1 stop4h 20mDelta
Thu 12/411:42 amSDF - PWM
1 stop4h 21mDelta
Deal found 11/14$392
This Delta deal was found by Cheapflights users on 11/14. 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 12/52:34 pmPWM - SDF
2 stops9h 25mDelta
Sun 12/73:16 pmSDF - PWM
1 stop7h 07mDelta
Deal found 11/14$438
This United Airlines deal was found by Cheapflights users on 11/14. 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 12/24:25 pmPWM - SDF
1 stop6h 04mUnited Airlines
Thu 12/42:05 pmSDF - PWM
2 stops9h 04mUnited Airlines
Deal found 11/14$472
This Southwest deal was found by Cheapflights users on 11/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:30 pmPWM - SDF
1 stop7h 20mSouthwest
Sun 12/712:25 pmSDF - PWM
2 stops11h 55mSouthwest
Deal found 11/15$478
This United Airlines deal was found by Cheapflights users on 11/14. 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 12/56:00 amPWM - SDF
2 stops11h 16mUnited Airlines
Sun 12/77:00 amSDF - PWM
2 stops7h 19mUnited Airlines
Deal found 11/14$517
This Southwest deal was found by Cheapflights users on 11/14. 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 12/25:30 amPWM - SDF
2 stops11h 05mSouthwest
Thu 12/46:45 amSDF - PWM
2 stops8h 10mSouthwest
Deal found 11/14$530

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 November 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$317
(Delta)

One-way from

$239
(American Airlines)

Popular in

August

Cheapest in

June

Average price

$381
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. 17% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 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 1/6

6:00 am-11:44 am

1 stop5h 44m

Louisville Intl

Sat 1/10

2:55 pm-7:38 pm

1 stop4h 43m

$317

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 1/8

2:31 pm-7:43 pm

1 stop5h 12m

Louisville Intl

Tue 1/13

8:30 am-1:56 pm

1 stop5h 26m

$352

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 1/8

5:45 am-1:35 pm

1 stop7h 50m

Louisville Intl

Tue 1/13

6:45 am-2:55 pm

2 stops8h 10m

$357

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 2/5

6:00 am-11:44 am

1 stop5h 44m

Louisville Intl

Sun 2/8

3:32 pm-10:29 pm

1 stop6h 57m

$364

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 1/8

12:46 pm-10:05 pm

1 stop9h 19m

Louisville Intl

Mon 1/12

6:00 am-11:43 pm

1 stop17h 43m

$367

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Thu 2/5

12:46 pm-10:05 pm

1 stop9h 19m

Louisville Intl

Sun 2/8

6:00 am-11:43 pm

1 stop17h 43m

$367

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 12/30

5:45 am-10:34 am

1 stop4h 49m

$239

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 12/30

11:50 am-6:25 pm

2 stops6h 35m

$384

PortlandLouisville

PWM - SDF

PWMSDF

Portland

Tue 12/30

11:58 am-7:23 pm

3 stops31h 25m

$1,149

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/15

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 November.
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 $111). Flying from Portland, Maine to Louisville in October is currently the most expensive (average of $248). 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 November 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
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
7.9
Good
8,007 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
9,013 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
11,050 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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 5h 12m. Fly via Delta, 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. Other airlines that can offer you cheap pricing are American Airlines, from $270, and United Airlines, from $376. Delta is 43% 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 $111). Flying from Portland, Maine to Louisville in October is currently the most expensive (average of $248). 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

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

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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$248Average$376FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$270Average$373FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$376Average$457FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$387Average$532FlexibilityNo cancel feeOn-time63%

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.