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$122+ Cheap flights from Louisville to San Diego (SDF - SAN)

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SAN
nov. 28 — dic. 51
vie. 11/28
vie. 12/5
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to San Diego are usually found in August or September, booked 56 days in advance, depart on a Wednesday or Thursday and return on a Saturday

Find flight deals from Louisville to San Diego

Cheapest flights from Louisville to San Diego
Explore the most affordable flight options available from Louisville to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 29, 2025.

This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/101:02 pmSDF - SAN
1 stop10h 43mAmerican Airlines
sáb. 12/136:15 amSAN - SDF
1 stop12h 45mAmerican Airlines
Deal found 10/28$276
This Delta deal was found by Cheapflights users on 10/27. 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.
lun. 11/2412:57 pmSDF - SAN
1 stop8h 23mDelta
jue. 11/2712:16 pmSAN - SDF
1 stop7h 44mDelta
Deal found 10/27$289
This United Airlines deal was found by Cheapflights users on 10/27. 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.
lun. 11/2411:00 amSDF - SAN
2 stops12h 05mUnited Airlines
jue. 11/2710:20 amSAN - SDF
1 stop6h 34mUnited Airlines
Deal found 10/27$294
This Delta deal was found by Cheapflights users on 10/27. 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.
lun. 11/246:03 pmSDF - SAN
1 stop7h 17mDelta
mié. 12/38:00 amSAN - SDF
1 stop6h 16mDelta
Deal found 10/27$305
This Southwest deal was found by Cheapflights users on 10/27. 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.
mié. 12/317:05 pmSDF - SAN
1 stop6h 55mSouthwest
lun. 1/56:35 amSAN - SDF
1 stop7h 15mSouthwest
Deal found 10/27$323
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/109:00 amSDF - SAN
2 stops9h 04mUnited Airlines
sáb. 12/1310:52 amSAN - SDF
1 stop6h 36mUnited Airlines
Deal found 10/28$333
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/246:27 amSDF - SAN
1 stop8h 56mAmerican Airlines
mié. 1/76:20 amSAN - SDF
1 stop13h 59mAmerican Airlines
Deal found 10/28$340
This American Airlines deal was found by Cheapflights users on 10/29. 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.
mié. 11/263:38 pmSDF - SAN
1 stop8h 22mAmerican Airlines
mié. 12/36:15 amSAN - SDF
1 stop6h 17mAmerican Airlines
Deal found 10/29$344
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/246:04 amSDF - SAN
1 stop11h 14mAmerican Airlines
vie. 11/286:20 amSAN - SDF
1 stop7h 30mAmerican Airlines
Deal found 10/28$345
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
jue. 12/43:55 pmSDF - SAN
2 stops11h 04mMultiple Airlines
dom. 12/78:10 pmSAN - SDF
1 stop21h 02mMultiple Airlines
Deal found 10/27$363
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/257:13 amSDF - SAN
1 stop8h 32mAmerican Airlines
mar. 12/212:40 pmSAN - SDF
1 stop8h 19mAmerican Airlines
Deal found 10/28$367

Cheap flight deals from Louisville to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to San Diego (SAN). 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 octubre 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$243
(American Airlines)

One-way from

$122
(Kiwi.com)

Popular in

March

Cheapest in

August

Average price

$462
Provider with most accurate pricing for Louisville Intl-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-San Diego flights.
Search Deals
From Louisville Intl to San Diego
Search Deals
One-way flight from Louisville Intl to San Diego
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to San Diego 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 octubre 29, 2025.
Use the filters below to find and compare flights from Louisville to San Diego that are best for you.

Fly from

Louisville

Fly to

San Diego

Route

Depart

Return

Price

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

mié. 2/11

1:32 pm-10:26 pm

1 stop11h 54m

San Diego

mar. 2/24

6:15 am-9:24 pm

1 stop12h 09m

$243

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

mié. 12/10

1:02 pm-8:45 pm

1 stop10h 43m

San Diego

sáb. 12/13

6:15 am-10:00 pm

1 stop12h 45m

$276

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

jue. 1/15

1:32 pm-10:26 pm

1 stop11h 54m

San Diego

dom. 1/18

7:10 am-5:33 pm

1 stop7h 23m

$286

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

lun. 11/24

12:57 pm-6:20 pm

1 stop8h 23m

San Diego

jue. 11/27

12:16 pm-11:00 pm

1 stop7h 44m

$289

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

lun. 11/24

11:00 am-8:05 pm

2 stops12h 05m

San Diego

jue. 11/27

10:20 am-7:54 pm

1 stop6h 34m

$294

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

mié. 12/31

7:05 pm-11:00 pm

1 stop6h 55m

San Diego

lun. 1/5

6:35 am-4:50 pm

1 stop7h 15m

$323

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

mié. 1/28

5:35 am-9:58 am

1 stop7h 23m

San Diego

sáb. 1/31

10:00 pm-10:01 am

1 stop9h 01m

$323

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

mié. 12/10

9:00 am-3:04 pm

2 stops9h 04m

San Diego

sáb. 12/13

10:52 am-8:28 pm

1 stop6h 36m

$333

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

jue. 2/12

6:30 am-1:00 pm

2 stops9h 30m

San Diego

dom. 2/15

7:05 am-5:10 pm

1 stop7h 05m

$360

LouisvilleSan Diego

SDF - SAN

SDFSAN

Louisville Intl

mié. 11/26

2:02 pm-6:50 pm

1 stop7h 48m

San Diego

mié. 12/3

8:45 am-8:28 pm

2 stops8h 43m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 19 results
1
2

Compare providers for flights from Louisville to San Diego

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 San Diego in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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-San Diego flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Louisville-San Diego flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Louisville-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-San Diego 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-San Diego 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 San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego 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 San Diego

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

Use this chart to determine the optimal time to book a round-trip flight from Louisville to San Diego. Price data was last updated on October 24, 2025.

Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from Louisville to San Diego. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Louisville to San Diego?

Currently, August is the cheapest month in which you can book a flight from Louisville to San Diego (average of $100). Flying from Louisville to San Diego in June is currently the most expensive (average of $189). 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 SAN?

Find hourly flight availability from Louisville to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 29, 2025.

It’s optimal to fly from Louisville to San Diego in the evening. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Louisville to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Louisville to San Diego. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Louisville to San Diego flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated octubre 29, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Louisville to San Diego by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
7,992 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,999 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,032 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,114 reviews
Southwest
8.0
Very good
4,241 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

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

    Airlines like American Airlines, Delta, and United Airlines fly from Louisville to San Diego in about 8h 23m. The time it takes to get you to your destination can typically vary by up to 3h 42m. The distance between Louisville and San Diego is about 1800 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 Louisville to San Diego round-trip?

    Cheapflights users have booked flights from Louisville to San Diego round-trip from $232. Other airlines that can offer you cheap pricing are United Airlines, from $274, and Delta, from $276. Users have found that Spirit Airlines is 49% cheaper than the other options available to this destination.

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

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

  • How can I find direct flights from Louisville to San Diego?

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

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

    Yes. Cheapflights offers flight deals from Louisville to San Diego 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 San Diego?

    Currently, August is the cheapest month in which you can book a flight from Louisville to San Diego (average of $100). Flying from Louisville to San Diego in June is currently the most expensive (average of $189). 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 San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
La Mesa
Poway
Lemon Grove
National City

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Top 5 airlines flying from Louisville to San Diego

Discover the top 5 airlines that operate flights from Louisville to San Diego. 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 octubre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$232Average$342FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$274Average$501FlexibilityNo cancel feeOn-time69%
DeltaCheapest$276Average$446FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$306Average$428FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$362Average$516FlexibilityNo cancel feeOn-time63%

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