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$309+ Cheap flights from Louisville to Portland, ME (SDF - PWM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/28. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — PWM
Mar 17 — Mar 241
Tue 3/17
Tue 3/24
1 adult, Economy
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Cheap flight deals from Louisville to Portland

Cheapest flights from Louisville to Portland
Explore the most affordable flight options available from Louisville to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 15, 2026.

This American Airlines deal was found by Cheapflights users on 2/14. 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.
Sat 3/286:33 am
SDF
-
PWM
1 stop17h 01m
American Airlines
Tue 3/315:40 pm
PWM
-
SDF
1 stop5h 40m
American Airlines
Deal found 2/14$309
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Wed 3/117:05 am
SDF
-
PWM
1 stop8h 09m
United Airlines
Wed 3/183:44 pm
PWM
-
SDF
1 stop8h 15m
United Airlines
Deal found 2/11$317
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/115:04 pm
SDF
-
PWM
1 stop6h 08m
Delta
Wed 3/186:25 am
PWM
-
SDF
2 stops7h 35m
Delta
Deal found 2/11$322
This American Airlines deal was found by Cheapflights users on 2/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/93:49 pm
SDF
-
PWM
1 stop7h 10m
American Airlines
Mon 3/166:00 pm
PWM
-
SDF
1 stop5h 20m
American Airlines
Deal found 2/13$341
This Southwest deal was found by Cheapflights users on 2/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/266:10 am
SDF
-
PWM
2 stops8h 05m
Southwest
Mon 3/305:30 pm
PWM
-
SDF
1 stop7h 10m
Southwest
Deal found 2/11$346
This Southwest deal was found by Cheapflights users on 2/14. 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.
Sat 3/283:00 pm
SDF
-
PWM
2 stops9h 10m
Southwest
Tue 3/314:30 pm
PWM
-
SDF
1 stop7h 00m
Southwest
Deal found 2/14$357
This United Airlines deal was found by Cheapflights users on 2/11. 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 3/149:00 am
SDF
-
PWM
1 stop6h 14m
United Airlines
Thu 3/194:23 pm
PWM
-
SDF
1 stop5h 50m
United Airlines
Deal found 2/11$370
This Kiwi.com deal was found by Cheapflights users on 2/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/512:36 pm
SDF
-
PWM
1 stop20h 36m
Multiple Airlines
Tue 6/93:16 pm
PWM
-
SDF
2 stops17h 20m
Multiple Airlines
Deal found 2/14$373
This Delta deal was found by Cheapflights users on 2/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3112:53 pm
SDF
-
PWM
1 stop5h 08m
Delta
Sun 8/26:50 pm
PWM
-
SDF
1 stop5h 09m
Delta
Deal found 2/13$387

Find flight deals from Louisville to Portland

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Portland (PWM). 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 February 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$309
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$357
Provider with most accurate pricing for Louisville Intl-Portland flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Portland flights.
Search Deals
From Louisville Intl to Portland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Portland 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 February 15, 2026.
Use the filters below to find and compare flights from Louisville to Portland that are best for you.

Fly from

Louisville

Fly to

Portland

Route

Depart

Return

Price

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Sat 3/28

6:33 am-11:34 pm

1 stop17h 01m

Portland

Tue 3/31

5:40 pm-11:20 pm

1 stop5h 40m

$309

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 3/11

7:05 am-3:14 pm

1 stop8h 09m

Portland

Wed 3/18

3:44 pm-11:59 pm

1 stop8h 15m

$317

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 3/11

5:04 pm-11:12 pm

1 stop6h 08m

Portland

Wed 3/18

6:25 am-2:00 pm

2 stops7h 35m

$322

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Thu 3/26

6:10 am-2:15 pm

2 stops8h 05m

Portland

Mon 3/30

5:30 pm-12:40 am

1 stop7h 10m

$346

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Sat 3/28

3:00 pm-12:10 am

2 stops9h 10m

Portland

Tue 3/31

4:30 pm-11:30 pm

1 stop7h 00m

$357

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Sat 3/14

9:00 am-3:14 pm

1 stop6h 14m

Portland

Thu 3/19

4:23 pm-10:13 pm

1 stop5h 50m

$370

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Fri 7/31

12:53 pm-6:01 pm

1 stop5h 08m

Portland

Sun 8/2

6:50 pm-11:59 pm

1 stop5h 09m

$387

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Fri 7/31

10:43 am-6:01 pm

1 stop7h 18m

Portland

Mon 8/3

6:50 pm-11:59 pm

1 stop5h 09m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/14

Compare providers for flights from Louisville to Portland

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 Louisville to Portland in February.
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 Louisville-Portland, Maine flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-Portland, Maine flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-Portland, Maine flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-Portland, Maine 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 Louisville-Portland, Maine 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 Louisville to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Louisville 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 Louisville to Portland

What is the cheapest month to book a flight from Louisville to Portland, Maine?

Currently, May is the cheapest month in which you can book a flight from Louisville to Portland, Maine (average of $130). Flying from Louisville to Portland, Maine in January 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 Portland

Get insights into the airlines that provide service to Portland. 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 Portland. Reviews last updated February 15, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Louisville to Portland. 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
4,286 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,286 reviews
Southwest
8.0
Very good
4,286 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,205 reviews
Southwest
8.0
Very good
4,286 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,296 reviews
Southwest
8.0
Very good
4,286 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,297 reviews
Southwest
8.0
Very good
4,286 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Louisville to Portland. 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 Louisville to Portland, Maine?

    A quick flight from Louisville to Portland, Maine can take about 6h 08m. American Airlines provides one of the quickest options available for as low as $322. The distance from Louisville to Portland, Maine is about 887 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Louisville to Portland, Maine round-trip?

    Cheapflights users have booked flights from Louisville to Portland, Maine round-trip from $236. Other airlines that can offer you cheap pricing are Delta, from $258, and United Airlines, from $283. American Airlines is 44% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Louisville to Portland that include hotel bookings?

    Yes. In addition to deals on Louisville to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to Portland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Louisville to Portland.

  • Can I find deals for business class flights from Louisville to Portland?

    Yes. Cheapflights offers flight deals from Louisville to Portland 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 Louisville to Portland, Maine?

    Currently, May is the cheapest month in which you can book a flight from Louisville to Portland, Maine (average of $130). Flying from Louisville to Portland, Maine in January 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 Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Brunswick
Auburn
Conway

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Louisville to Portland

Discover the top 4 airlines that operate flights from Louisville to Portland. 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 February 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$391FlexibilityNo cancel feeOn-time71%
DeltaCheapest$258Average$388FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$283Average$599FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$296Average$476FlexibilityNo cancel feeOn-time63%

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