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$149+ 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — PWM
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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1. Tell us where you want to go
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2. Select your favorite providers
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Cheapflights Tip: The best prices from Louisville Intl to Portland are usually found in September or June, booked 67 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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$297
(American Airlines)

One-way from

$149
(American Airlines)

Popular in

March

Cheapest in

September

Average price

$560
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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One-way flight from Louisville Intl to Portland
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Highest demand for flights based on searches. 4% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 25, 2025.

This American Airlines deal was found by Cheapflights users on 3/24. 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 4/305:41 amSDF - PWM
1 stop5h 43mAmerican Airlines
Mon 5/54:01 pmPWM - SDF
1 stop5h 55mAmerican Airlines
Deal found 3/24$297
This Southwest deal was found by Cheapflights users on 3/24. 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 6/46:25 amSDF - PWM
2 stops7h 00mSouthwest
Tue 6/105:30 amPWM - SDF
1 stop6h 50mSouthwest
Deal found 3/24$302
This Delta deal was found by Cheapflights users on 3/24. 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 4/3012:55 pmSDF - PWM
2 stops11h 47mDelta
Mon 5/51:52 pmPWM - SDF
2 stops10h 07mDelta
Deal found 3/24$307
This United Airlines deal was found by Cheapflights users on 3/24. 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 7/82:10 pmSDF - PWM
2 stops9h 04mUnited Airlines
Sat 7/195:35 amPWM - SDF
1 stop4h 52mUnited Airlines
Deal found 3/24$372
This Mytrip deal was found by Cheapflights users on 3/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/85:12 pmSDF - PWM
3 stops26h 20mMultiple Airlines
Sat 4/128:12 pmPWM - SDF
2 stops26h 05mMultiple Airlines
Deal found 3/24$734
This KAYAK deal was found by Cheapflights users on 3/24. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/108:44 pmSDF - PWM
3 stops17h 23mBreeze Airways
Mon 7/142:52 pmPWM - SDF
2 stops46h 24mBreeze Airways
Deal found 3/24$1,098

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 March 25, 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 4/30

5:41 am-11:24 am

1 stop5h 43m

Portland

Mon 5/5

4:01 pm-9:56 pm

1 stop5h 55m

$297

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 6/4

6:25 am-1:25 pm

2 stops7h 00m

Portland

Tue 6/10

5:30 am-12:20 pm

1 stop6h 50m

$302

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 4/30

12:55 pm-12:42 am

2 stops11h 47m

Portland

Mon 5/5

1:52 pm-11:59 pm

2 stops10h 07m

$307

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Tue 7/8

2:10 pm-11:14 pm

2 stops9h 04m

Portland

Sat 7/19

5:35 am-10:27 am

1 stop4h 52m

$372

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Tue 4/8

5:12 pm-7:32 pm

3 stops26h 20m

Portland

Sat 4/12

8:12 pm-10:17 pm

2 stops26h 05m

$734

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Thu 7/10

8:44 pm-2:07 pm

3 stops17h 23m

Portland

Mon 7/14

2:52 pm-1:16 pm

2 stops46h 24m

$1,098

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 8/13

6:11 pm-10:06 pm

1 stop3h 55m

$149

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Wed 8/13

2:59 pm-11:45 pm

2 stops8h 46m

$154

LouisvillePortland

SDF - PWM

SDFPWM

Louisville Intl

Sun 5/18

6:00 am-9:56 am

1 stop3h 56m

$400

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 March 21, 2025.

The best time to book flights from Louisville to Portland, Maine is 67 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 April is currently the most expensive (average of $423). 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 March 25, 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.

Rainfall in Portland by month

Plan your trip to Portland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portland, Maine ranges from 2.9 - 4.5 inches per month. November is typically the wettest month, when rainfall can reach 4.5 in. August is typically the driest time to visit Portland, Maine when rainfall is around 2.9 in.

Temperature in Portland by month

Plan your trip to Portland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portland, Maine, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 March 25, 2025.
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,272 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,890 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Breeze Airways
8.0
Very good
156 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,605 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,272 reviews

Crew

8.6

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • 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 $297. Other airlines that can offer you cheap pricing are Southwest, from $302, and Delta, from $307. American Airlines is 32% 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 ($149), Delta ($154), and United Airlines ($400).

  • 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 April is currently the most expensive (average of $423). 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
North Conway
Bath
Brunswick
Auburn
Conway
Lewiston

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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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$261Average$503FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$280Average$387FlexibilityNo cancel feeOn-time71%
DeltaCheapest$294Average$418FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$361Average$431FlexibilityNo cancel feeOn-time63%
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