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$237+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — PWM
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
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 April, 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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$251
(Delta)

Popular in

March

Cheapest in

August

Average price

$447
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
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($9 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 September 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 September 29, 2025.

This Delta deal was found by Cheapflights users on 9/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:55 amSDF - PWM
1 stop4h 05mDelta
Wed 10/295:42 amPWM - SDF
1 stop7h 07mDelta
Deal found 9/28$251
This Southwest deal was found by Cheapflights users on 9/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/75:30 amSDF - PWM
1 stop5h 40mSouthwest
Sun 11/95:30 amPWM - SDF
1 stop6h 50mSouthwest
Deal found 9/29$370
This Southwest deal was found by Cheapflights users on 9/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:40 amSDF - PWM
1 stop5h 30mSouthwest
Sun 10/265:30 amPWM - SDF
1 stop7h 00mSouthwest
Deal found 9/29$390
This Delta deal was found by Cheapflights users on 9/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/143:09 pmSDF - PWM
2 stops8h 45mDelta
Sun 11/164:53 pmPWM - SDF
1 stop4h 21mDelta
Deal found 9/29$392
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/109:41 pmSDF - PWM
1 stop19h 57mMultiple Airlines
Wed 10/157:37 pmPWM - SDF
2 stops37h 24mMultiple Airlines
Deal found 9/29$441
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/133:35 pmSDF - PWM
1 stop7h 17mAmerican Airlines
Thu 10/167:44 amPWM - SDF
1 stop7h 18mAmerican Airlines
Deal found 9/29$447
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/138:52 pmSDF - PWM
2 stops37h 44mMultiple Airlines
Fri 10/179:46 amPWM - SDF
1 stop13h 01mMultiple Airlines
Deal found 9/28$549

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 September 29, 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 12/9

5:28 pm-11:21 pm

1 stop5h 53m

Portland

Tue 12/16

4:53 pm-9:13 pm

1 stop4h 20m

$251

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 10/22

7:55 am-12:00 pm

1 stop4h 05m

Portland

Wed 10/29

5:42 am-12:49 pm

1 stop7h 07m

$251

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Tue 12/9

5:30 am-12:10 pm

1 stop6h 40m

Portland

Tue 12/16

5:30 am-2:45 pm

2 stops9h 15m

$256

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Fri 11/14

10:39 am-4:07 pm

1 stop5h 28m

Portland

Sun 11/16

4:53 pm-9:14 pm

1 stop4h 21m

$370

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 3/25

6:05 am-11:00 am

1 stop4h 55m

Portland

Thu 3/26

4:50 pm-9:45 pm

1 stop4h 55m

$387

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Thu 10/23

5:40 am-11:10 am

1 stop5h 30m

Portland

Sun 10/26

5:30 am-12:30 pm

1 stop7h 00m

$390

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Mon 10/6

6:43 pm-10:36 am

2 stops39h 53m

$237

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Sun 10/5

8:52 pm-9:06 am

1 stop12h 14m

$263

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Sat 10/4

6:00 am-10:54 am

1 stop4h 54m

$325

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Mon 10/6

5:00 pm-11:09 pm

1 stop6h 09m

$334

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/29

Showing 1-10 of 12 results
1
2

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 September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 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

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 September 26, 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, January is the cheapest month in which you can book a flight from Louisville to Portland, Maine (average of $296). Flying from Louisville to Portland, Maine in July is currently the most expensive (average of $394). 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 September 29, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 25% 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 September 29, 2025.
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
4,246 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

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
8.0
Very good
7,964 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

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
8,924 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

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
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Overall

8.0

Comfort

8.0

Crew

8.6

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 5h 53m. Delta provides one of the quickest options available for as low as $251. 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 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, January is the cheapest month in which you can book a flight from Louisville to Portland, Maine (average of $296). Flying from Louisville to Portland, Maine in July is currently the most expensive (average of $394). 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
Brunswick
North Conway
Auburn
Conway

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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 September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$398FlexibilityNo cancel feeOn-time71%
DeltaCheapest$258Average$387FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$283Average$626FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$296Average$431FlexibilityNo cancel feeOn-time63%

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