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$161+ Cheap flights from Portland to Louisville (PDX - SDF)

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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SDF
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
1 adult, Economy
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Cheap flight deals from Portland to Louisville

Cheapest flights from Portland to Louisville
Explore the most affordable flight options available from Portland to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 11, 2026.

This Southwest deal was found by Cheapflights users on 3/9. 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 4/111:55 pm
PDX
-
SDF
1 stop7h 00m
Southwest
Wed 4/87:15 pm
SDF
-
PDX
1 stop6h 55m
Southwest
Deal found 3/9$321
This Southwest deal was found by Cheapflights users on 3/10. 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.
Mon 4/2711:55 pm
PDX
-
SDF
1 stop6h 55m
Southwest
Wed 5/68:25 am
SDF
-
PDX
1 stop7h 30m
Southwest
Deal found 3/10$323
This Southwest deal was found by Cheapflights users on 3/10. 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 4/1811:55 pm
PDX
-
SDF
1 stop6h 50m
Southwest
Tue 4/217:15 pm
SDF
-
PDX
1 stop6h 55m
Southwest
Deal found 3/10$328
This Southwest deal was found by Cheapflights users on 3/9. 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.
Mon 4/611:55 pm
PDX
-
SDF
1 stop6h 55m
Southwest
Mon 4/138:10 pm
SDF
-
PDX
1 stop7h 00m
Southwest
Deal found 3/9$335
This Southwest deal was found by Cheapflights users on 3/8. 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 5/66:40 am
PDX
-
SDF
1 stop6h 10m
Southwest
Wed 5/201:35 pm
SDF
-
PDX
2 stops10h 25m
Southwest
Deal found 3/8$366
This United Airlines deal was found by Cheapflights users on 3/11. 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 4/188:40 am
PDX
-
SDF
2 stops8h 36m
United Airlines
Wed 4/225:48 pm
SDF
-
PDX
1 stop7h 46m
United Airlines
Deal found 3/11$368
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Sun 4/1910:23 pm
PDX
-
SDF
1 stop7h 15m
American Airlines
Tue 5/56:00 am
SDF
-
PDX
1 stop9h 33m
American Airlines
Deal found 3/10$379

Find flight deals from Portland to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Louisville (SDF). 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 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$321
(Southwest)

One-way from

$161
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$585
Provider with most accurate pricing for Portland-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Louisville Intl flights.
Search Deals
From Portland to Louisville Intl
Search Deals
One-way flight from Portland to Louisville Intl
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Louisville 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 11, 2026.
Use the filters below to find and compare flights from Portland to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Wed 4/1

11:55 pm-9:55 am

1 stop7h 00m

Louisville Intl

Wed 4/8

7:15 pm-11:10 pm

1 stop6h 55m

$321

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Sat 4/18

11:55 pm-9:45 am

1 stop6h 50m

Louisville Intl

Tue 4/21

4:40 pm-11:10 pm

2 stops9h 30m

$333

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Wed 5/20

2:41 pm-11:56 pm

1 stop6h 15m

Louisville Intl

Sat 5/23

5:35 am-11:38 am

1 stop9h 03m

$335

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Tue 6/9

10:55 pm-9:51 am

1 stop7h 56m

Louisville Intl

Sun 6/14

5:45 pm-11:59 pm

1 stop9h 14m

$386

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Thu 5/28

2:06 pm-12:25 am

1 stop7h 19m

Louisville Intl

Sun 5/31

6:05 am-10:53 am

1 stop7h 48m

$386

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Wed 5/6

11:55 pm-9:25 am

1 stop6h 30m

Louisville Intl

Wed 5/13

6:00 am-12:43 pm

1 stop9h 43m

$411

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Tue 4/21

2:30 pm-11:59 pm

1 stop6h 29m

Louisville Intl

Wed 4/22

6:00 am-12:34 pm

1 stop9h 34m

$411
Cheapest one-way

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Tue 3/31

10:50 am-10:30 pm

1 stop8h 40m

$161

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Tue 5/19

11:55 pm-9:50 am

1 stop6h 55m

$161

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Wed 4/1

11:55 pm-9:55 am

1 stop7h 00m

$161

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Compare providers for flights from Portland to Louisville

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Portland to Louisville. Price data was last updated on March 6, 2026.

The best time to book flights from Portland to Louisville is 15 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 Portland to Louisville?

Currently, June is the cheapest month in which you can book a flight from Portland to Louisville (average of $69). Flying from Portland to Louisville in February is currently the most expensive (average of $364). 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 Louisville

Get insights into the airlines that provide service to Louisville. 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 Louisville. Reviews last updated March 11, 2026.
Read through reviews of airlines operating flights from Portland to Louisville, such as Alaska Airlines,Southwest, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
12,025 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
Alaska Airlines
8.0
Very good
12,025 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
Southwest
8.0
Very good
4,317 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
Delta
7.9
Good
8,278 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
United Airlines
7.4
Good
9,413 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.
American Airlines
7.1
Good
11,419 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Entertainment

7.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Related info for your journey

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

    Airlines like Southwest and United Airlines fly from Portland to Louisville in about 6h 15m. The time it takes to get you to your destination can typically vary by up to 45m. Airlines will cover a distance of 1944 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Southwest ($262), American Airlines ($280), and United Airlines ($286) offers the cheapest pricing from Portland to Louisville. You may be able to fly from Portland to Louisville for 43% less than the average price by searching for these airlines.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $127. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Portland to Louisville for a low price.

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

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

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

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

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

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

    Currently, June is the cheapest month in which you can book a flight from Portland to Louisville (average of $69). Flying from Portland to Louisville in February is currently the most expensive (average of $364). 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
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Portland to Louisville

Discover the top 5 airlines that operate flights from Portland to Louisville. 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 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$262Average$427FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$280Average$411FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$286Average$494FlexibilityNo cancel feeOn-time69%
DeltaCheapest$300Average$468FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$506Average$676FlexibilityNo cancel feeOn-time75%

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