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$194+ Cheap flights from Louisville to Portland, ME (SDF - PWM)

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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — PWM
Jan 30 — Feb 61
Fri 1/30
Fri 2/6
1 adult, Economy
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Cheap flight deals from Louisville to Portland

Best flights from Louisville to Portland
Discover carefully curated flight deals from Louisville to Portland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 31, 2025.

This Southwest deal was found by Cheapflights users on 12/30. 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 1/275:35 amSDF - PWM
1 stop6h 35mSouthwest
Tue 2/33:30 pmPWM - SDF
1 stop7h 15mSouthwest
Deal found 12/30$317
This Delta deal was found by Cheapflights users on 12/30. 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 1/2710:41 amSDF - PWM
2 stops11h 46mDelta
Tue 2/32:35 pmPWM - SDF
2 stops9h 15mDelta
Deal found 12/30$327
This Kiwi.com deal was found by Cheapflights users on 12/30. 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.
Thu 2/262:26 pmSDF - PWM
1 stop20h 23mMultiple Airlines
Sun 3/16:19 pmPWM - SDF
1 stop15h 56mMultiple Airlines
Deal found 12/30$336
This American Airlines deal was found by Cheapflights users on 12/30. 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 2/611:08 amSDF - PWM
1 stop5h 29mAmerican Airlines
Mon 2/95:20 amPWM - SDF
1 stop5h 18mAmerican Airlines
Deal found 12/30$364
This United Airlines deal was found by Cheapflights users on 12/29. 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 1/138:29 amSDF - PWM
1 stop6h 10mUnited Airlines
Sat 1/173:05 pmPWM - SDF
1 stop8h 18mUnited Airlines
Deal found 12/29$368
This United Airlines deal was found by Cheapflights users on 12/28. 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 1/178:29 amSDF - PWM
1 stop6h 10mUnited Airlines
Sun 1/183:42 pmPWM - SDF
1 stop7h 41mUnited Airlines
Deal found 12/28$374
This Delta deal was found by Cheapflights users on 12/30. 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 2/65:00 pmSDF - PWM
1 stop6h 22mDelta
Mon 2/96:00 amPWM - SDF
2 stops8h 36mDelta
Deal found 12/30$378

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 December 31, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$317
(Southwest)

One-way from

$194
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$599
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
One-way flight from Louisville Intl to Portland
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 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 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 December 31, 2025.
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

Tue 1/27

5:35 am-12:10 pm

1 stop6h 35m

Portland

Tue 2/3

3:30 pm-10:45 pm

1 stop7h 15m

$317

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Tue 1/27

10:41 am-10:27 pm

2 stops11h 46m

Portland

Tue 2/3

2:35 pm-11:50 pm

2 stops9h 15m

$327

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Thu 2/26

2:26 pm-10:49 am

1 stop20h 23m

Portland

Sun 3/1

6:19 pm-10:15 am

1 stop15h 56m

$336

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Fri 2/6

11:08 am-4:37 pm

1 stop5h 29m

Portland

Mon 2/9

5:20 am-10:38 am

1 stop5h 18m

$364

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Tue 1/13

8:29 am-2:39 pm

1 stop6h 10m

Portland

Sat 1/17

3:05 pm-11:23 pm

1 stop8h 18m

$368

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Sat 1/17

8:29 am-2:39 pm

1 stop6h 10m

Portland

Sun 1/18

3:42 pm-11:23 pm

1 stop7h 41m

$374

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Fri 2/6

5:00 pm-11:22 pm

1 stop6h 22m

Portland

Mon 2/9

6:00 am-2:36 pm

2 stops8h 36m

$378

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 4/1

6:35 am-3:55 pm

2 stops9h 20m

$199

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 4/1

12:33 pm-4:26 pm

3 stops51h 53m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

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 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 Louisville-Portland, Maine flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Louisville-Portland, Maine flight deals on Cheapflights vs. eDreams >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 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 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 July 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 December 31, 2025.
Read reviews from past customers who have flown Southwest, Delta, and American 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
4,251 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

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
4,251 reviews
Southwest
8.0
Very good
4,251 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

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
8,013 reviews
Southwest
8.0
Very good
4,251 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

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
11,075 reviews
Southwest
8.0
Very good
4,251 reviews

Crew

8.6

Overall

8.0

Comfort

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

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 5h 29m. Southwest provides one of the quickest options available for as low as $364. 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 $183. Other airlines that can offer you cheap pricing are American Airlines, from $236, and Southwest, from $296. Delta is 57% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Louisville to Portland, Maine one-way?

    The cheapest airlines for a one-way flight from Louisville to Portland, Maine are American Airlines ($108), United Airlines ($122), and Delta ($123).

  • 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 July 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

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Top 3 airlines flying from Louisville to Portland

Discover the top 3 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 December 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$396FlexibilityNo cancel feeOn-time71%
DeltaCheapest$270Average$403FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$296Average$436FlexibilityNo cancel feeOn-time63%

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