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$346+ 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 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — PWM
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Louisville Intl to Portland are usually found in August or October, booked 73 days in advance, depart on a Monday or Sunday and return on a Wednesday

Cheap 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 November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$346
(American Airlines)

Popular in

March

Cheapest in

August

Average price

$522
Provider with most accurate pricing for Louisville Intl-Portland flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Portland flights.
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From Louisville Intl to Portland
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Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 13, 2025.

This American Airlines deal was found by Cheapflights users on 11/12. 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.
Wed 12/248:00 amSDF - PWM
1 stop5h 22mAmerican Airlines
Thu 12/259:30 amPWM - SDF
1 stop5h 42mAmerican Airlines
Deal found 11/12$346
This Delta deal was found by Cheapflights users on 11/12. 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 11/276:00 amSDF - PWM
1 stop6h 30mDelta
Mon 12/112:48 pmPWM - SDF
1 stop4h 35mDelta
Deal found 11/12$390
This Southwest deal was found by Cheapflights users on 11/12. 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.
Wed 12/2412:50 pmSDF - PWM
2 stops9h 25mSouthwest
Thu 12/2512:45 pmPWM - SDF
2 stops10h 20mSouthwest
Deal found 11/12$443
This American Airlines deal was found by Cheapflights users on 11/12. 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.
Thu 11/2712:44 pmSDF - PWM
2 stops29h 26mAmerican Airlines
Mon 12/15:43 amPWM - SDF
1 stop4h 56mAmerican Airlines
Deal found 11/12$477
This Southwest deal was found by Cheapflights users on 11/12. 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 12/255:30 amSDF - PWM
1 stop6h 40mSouthwest
Thu 12/253:30 pmPWM - SDF
1 stop7h 20mSouthwest
Deal found 11/12$504
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Thu 12/259:05 amSDF - PWM
1 stop5h 09mUnited Airlines
Thu 12/256:46 pmPWM - SDF
2 stops18h 27mUnited Airlines
Deal found 11/12$631
This American Airlines deal was found by Cheapflights users on 11/12. 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 11/146:01 amSDF - PWM
1 stop10h 40mAmerican Airlines
Sun 11/1612:26 pmPWM - SDF
1 stop9h 03mAmerican Airlines
Deal found 11/12$749
This United Airlines deal was found by Cheapflights users on 11/12. 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 11/149:00 amSDF - PWM
2 stops8h 48mUnited Airlines
Sun 11/166:00 amPWM - SDF
1 stop6h 11mUnited Airlines
Deal found 11/12$830
This United Airlines deal was found by Cheapflights users on 11/11. 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 11/262:02 pmSDF - PWM
1 stop7h 48mUnited Airlines
Sun 11/305:00 pmPWM - SDF
1 stop5h 29mUnited Airlines
Deal found 11/11$1,128

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 November 13, 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

Wed 12/24

8:00 am-1:22 pm

1 stop5h 22m

Portland

Thu 12/25

9:30 am-3:12 pm

1 stop5h 42m

$346

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 3/25

6:05 am-11:00 am

1 stop4h 55m

Portland

Thu 3/26

6:00 am-11:05 am

1 stop5h 05m

$352

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Mon 5/11

11:10 am-4:15 pm

1 stop5h 05m

Portland

Wed 5/20

6:10 am-12:40 pm

1 stop6h 30m

$387

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Fri 5/8

7:20 am-11:55 am

1 stop4h 35m

Portland

Fri 5/15

12:50 pm-5:41 pm

1 stop4h 51m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

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 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 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

How far ahead should I book a flight from Louisville to Portland, Maine?

Use this chart to determine the optimal time to book a round-trip flight from Louisville to Portland. Price data was last updated on November 7, 2025.

The best time to book flights from Louisville to Portland, Maine is 73 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, February is the cheapest month in which you can book a flight from Louisville to Portland, Maine (average of $120). 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.

What is the cheapest time of day to fly from SDF to PWM?

Find hourly flight availability from Louisville to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 13, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 24% on flights from Louisville to Portland, Maine by exploring options for tickets in the evening.

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 November 13, 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
4,242 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

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
4,242 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

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
11,051 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

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 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 4h 55m. American Airlines provides one of the quickest options available for as low as $352. 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 $270, and Southwest, from $296. American Airlines is 45% 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, February is the cheapest month in which you can book a flight from Louisville to Portland, Maine (average of $120). 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$397FlexibilityNo cancel feeOn-time71%
DeltaCheapest$270Average$403FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$296Average$436FlexibilityNo cancel feeOn-time63%

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