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$105+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SDF
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Louisville Intl are usually found in September or August, booked 84 days in advance, depart on a Tuesday or Friday and return on a Wednesday

Cheap 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 September 11, 2025.

Round-trip from

$233
(Delta)

One-way from

$105
(Southwest)

Popular in

March

Cheapest in

September

Average price

$366
From Portland to Louisville Intl
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One-way flight from Portland to Louisville Intl
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Highest demand for flights based on searches. 13% potential increase in price ($74 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($25 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 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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/12:10 pmPDX - SDF
1 stop6h 51mDelta
Sat 11/156:35 amSDF - PDX
1 stop7h 43mDelta
Deal found 9/9$233
This Southwest deal was found by Cheapflights users on 9/8. 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.
Tue 10/76:15 amPDX - SDF
2 stops15h 15mSouthwest
Tue 10/146:00 amSDF - PDX
1 stop6h 45mSouthwest
Deal found 9/8$237
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:20 amPDX - SDF
1 stop6h 21mDelta
Wed 11/126:00 amSDF - PDX
1 stop7h 38mDelta
Deal found 9/9$238
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/511:26 amPDX - SDF
1 stop9h 35mDelta
Wed 11/123:09 pmSDF - PDX
1 stop10h 12mDelta
Deal found 9/9$243
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/11:55 pmPDX - SDF
1 stop5h 59mDelta
Thu 11/136:03 pmSDF - PDX
1 stop7h 02mDelta
Deal found 9/9$260
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3111:39 amPDX - SDF
1 stop6h 36mDelta
Sat 11/152:53 pmSDF - PDX
1 stop7h 37mDelta
Deal found 9/9$264
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/62:10 pmPDX - SDF
1 stop6h 51mDelta
Tue 11/116:03 pmSDF - PDX
1 stop7h 02mDelta
Deal found 9/9$265
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3111:39 amPDX - SDF
1 stop6h 36mDelta
Tue 11/116:35 amSDF - PDX
1 stop7h 43mDelta
Deal found 9/9$269
This Southwest deal was found by Cheapflights users on 9/9. 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 11/175:30 amPDX - SDF
1 stop9h 40mSouthwest
Wed 11/196:45 amSDF - PDX
2 stops10h 10mSouthwest
Deal found 9/9$270
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 10/2411:58 pmPDX - SDF
1 stop10h 49mAmerican Airlines
Mon 10/276:17 pmSDF - PDX
1 stop7h 51mAmerican Airlines
Deal found 9/10$276
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/22:10 pmPDX - SDF
1 stop6h 51mDelta
Sat 11/156:00 amSDF - PDX
1 stop7h 38mDelta
Deal found 9/9$279

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 September 11, 2025.
Use the filters below to find and compare flights from Portland to Louisville that are best for you.

Fly from

Portland

Fly to

Louisville

Route

Depart

Return

Price

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Tue 10/7

6:15 am-12:30 am

2 stops15h 15m

Louisville Intl

Tue 10/14

6:00 am-9:45 am

1 stop6h 45m

$237

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Mon 11/3

12:40 am-11:56 am

1 stop8h 16m

Louisville Intl

Sat 11/8

7:00 am-12:50 pm

1 stop8h 50m

$238

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Tue 11/4

12:40 am-11:56 am

1 stop8h 16m

Louisville Intl

Tue 11/11

3:09 pm-10:21 pm

1 stop10h 12m

$243

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Fri 10/31

11:39 am-9:15 pm

1 stop6h 36m

Louisville Intl

Sat 11/8

7:00 am-12:50 pm

1 stop8h 50m

$264

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Wed 11/5

11:39 am-9:15 pm

1 stop6h 36m

Louisville Intl

Thu 11/13

6:03 pm-10:05 pm

1 stop7h 02m

$265

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Thu 11/6

2:10 pm-12:01 am

1 stop6h 51m

Louisville Intl

Tue 11/11

6:03 pm-10:05 pm

1 stop7h 02m

$265

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Wed 12/17

12:32 am-11:57 am

1 stop8h 25m

Louisville Intl

Mon 1/5

2:59 pm-10:39 pm

1 stop10h 40m

$265

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Sun 11/2

7:57 pm-2:02 pm

1 stop15h 05m

Louisville Intl

Thu 11/13

5:20 pm-11:56 am

2 stops21h 36m

$283

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Sun 11/2

12:08 pm-10:54 pm

1 stop7h 46m

Louisville Intl

Wed 11/12

6:00 am-10:38 am

1 stop7h 38m

$284

PortlandLouisville

PDX - SDF

PDXSDF

Portland

Wed 11/5

6:05 am-5:10 pm

2 stops8h 05m

Louisville Intl

Wed 11/19

6:45 am-1:55 pm

2 stops10h 10m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 20 results
1
2

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 August 29, 2025.

The best time to book flights from Portland to Louisville is 83 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, January is the cheapest month in which you can book a flight from Portland to Louisville (average of $299). Flying from Portland to Louisville in April is currently the most expensive (average of $369). 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 PDX to SDF?

Find hourly flight availability from Portland to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s typically best to fly out from Portland to Louisville in the afternoon. Doing so could potentially save you 55% on the flight price compared to flying in the morning, which is usually more expensive.

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 September 11, 2025.
Read through reviews of airlines operating flights from Portland to Louisville, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,248 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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 Delta fly from Portland to Louisville in about 8h 16m. The time it takes to get you to your destination can typically vary by up to 6h 59m. 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 ($299), Delta ($300), and American Airlines ($324) offers the cheapest pricing from Portland to Louisville. You may be able to fly from Portland to Louisville for 36% less than the average price by searching for these airlines.

  • 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, January is the cheapest month in which you can book a flight from Portland to Louisville (average of $299). Flying from Portland to Louisville in April is currently the most expensive (average of $369). 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

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$299Average$451FlexibilityNo cancel feeOn-time63%
DeltaCheapest$300Average$437FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$324Average$466FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$330Average$510FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$506Average$676FlexibilityNo cancel feeOn-time75%

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