Find cheap Southwest flights to San Diego
RDU — SAN
Aug 26 — Sep 21
Round-trip
1 adult, Economy
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Cheapest Southwest flights from USA to San DiegoExplore the most affordable Southwest flight options available from USA to San Diego. Find the lowest fares with prices last updated on July 27, 2026.
Explore the most affordable Southwest flight options available from USA to San Diego. Find the lowest fares with prices last updated on July 27, 2026.
This Southwest deal was found by Cheapflights users on 7/23. 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 8/226:25 am
SFO
- SAN
Nonstop1h 30m
Southwest
Mon 8/247:00 pm
SAN
- SFO
Nonstop1h 30m
Southwest
Deal found 7/23![Southwest logo]()
$97
This Southwest deal was found by Cheapflights users on 7/23. 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 8/226:25 am
SFO
- SAN
Nonstop1h 30m
Southwest
Sat 8/292:35 pm
SAN
- SFO
1 stop6h 00m
Southwest
Deal found 7/23![Southwest logo]()
$107
This Southwest deal was found by Cheapflights users on 7/27. 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.
Thu 8/202:00 pm
SFO
- SAN
Nonstop1h 35m
Southwest
Mon 8/241:05 pm
SAN
- SFO
Nonstop1h 35m
Southwest
Deal found 7/27![Southwest logo]()
$117
Best Southwest flights from USA to San DiegoDiscover carefully curated Southwest flight deals from USA to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
Discover carefully curated Southwest flight deals from USA to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
This Southwest deal was found by Cheapflights users on 7/23. 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 8/177:00 am
SFO
- SAN
1 stop5h 35m
Southwest
Mon 8/174:55 pm
SAN
- SFO
Nonstop1h 35m
Southwest
Deal found 7/23![Southwest logo]()
$107
This Southwest deal was found by Cheapflights users on 7/23. 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 8/293:25 pm
SFO
- SAN
Nonstop1h 35m
Southwest
Mon 8/313:20 pm
SAN
- SFO
2 stops6h 10m
Southwest
Deal found 7/23![Southwest logo]()
$112
This Southwest deal was found by Cheapflights users on 7/22. 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 8/269:35 am
SFO
- SAN
2 stops5h 50m
Southwest
Sat 8/296:35 am
SAN
- SFO
1 stop5h 00m
Southwest
Deal found 7/22![Southwest logo]()
$122
Direct Southwest flights from USA to San DiegoExplore non-stop Southwest flight options from USA to San Diego based on user searches, and compare prices and availability for your desired travel dates. Data last updated July 27, 2026.
Explore non-stop Southwest flight options from USA to San Diego based on user searches, and compare prices and availability for your desired travel dates. Data last updated July 27, 2026.
This Southwest deal was found by Cheapflights users on 7/23. 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 8/226:25 am
SFO
- SAN
Nonstop1h 30m
Southwest
Mon 8/247:00 pm
SAN
- SFO
Nonstop1h 30m
Southwest
Deal found 7/23![Southwest logo]()
$97
This Southwest deal was found by Cheapflights users on 7/23. 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 9/53:25 pm
SFO
- SAN
Nonstop1h 35m
Southwest
Sun 9/68:40 am
SAN
- SFO
Nonstop1h 35m
Southwest
Deal found 7/23![Southwest logo]()
$112
This Southwest deal was found by Cheapflights users on 7/27. 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.
Mon 8/2410:50 am
SFO
- SAN
Nonstop1h 40m
Southwest
Mon 8/319:20 am
SAN
- SFO
Nonstop1h 35m
Southwest
Deal found 7/27![Southwest logo]()
$117
Last-minute Southwest flights from USA to San DiegoDiscover last-minute Southwest flight deals from USA to San Diego. Data last updated July 27, 2026 and is based on user searches.
Discover last-minute Southwest flight deals from USA to San Diego. Data last updated July 27, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/23. 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 8/226:25 am
SFO
- SAN
Nonstop1h 30m
Southwest
Mon 8/247:00 pm
SAN
- SFO
Nonstop1h 30m
Southwest
Deal found 7/23![Southwest logo]()
$97
This Southwest deal was found by Cheapflights users on 7/23. 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 8/226:25 am
SFO
- SAN
Nonstop1h 30m
Southwest
Sat 8/292:35 pm
SAN
- SFO
1 stop6h 00m
Southwest
Deal found 7/23![Southwest logo]()
$107
This Southwest deal was found by Cheapflights users on 7/27. 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.
Thu 8/202:00 pm
SFO
- SAN
Nonstop1h 35m
Southwest
Mon 8/241:05 pm
SAN
- SFO
Nonstop1h 35m
Southwest
Deal found 7/27![Southwest logo]()
$117
One-way Southwest flights to San DiegoSearch for one-way Southwest flight options to San Diego. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
Search for one-way Southwest flight options to San Diego. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
This Southwest deal was found by Cheapflights users on 7/27. 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.
Thu 8/2010:50 am
SFO
- SAN
Nonstop1h 40m
Southwest
Deal found 7/27![Southwest logo]()
$59
This Southwest deal was found by Cheapflights users on 7/23. 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 9/311:30 am
SFO
- SAN
2 stops8h 30m
Southwest
Deal found 7/23![Southwest logo]()
$64
This Southwest deal was found by Cheapflights users on 7/24. 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.
Mon 8/247:00 am
SFO
- SAN
1 stop5h 35m
Southwest
Deal found 7/24![Southwest logo]()
$69
Flights to San Diego with Southwest at a glance
Find detailed information about Southwest flights from USA to San Diego. Explore the options provided by Southwest to plan your journey from USA to San Diego. Data last updated July 27, 2026.
Cheapflights Insights
Find cheap Southwest flights to San Diego
US0-SAN
SFO-SAN
How long is the flight to San Diego with Southwest?
On average, Southwest flights from the United States to San Diego take 4 hours 30 minutes. Flights to San Diego from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.
Southwest weekly flight availability to San Diego
The most flights to San Diego operated by Southwest are scheduled on a Monday (136 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (96 on average).
When is the best time to book a flight to San Diego with Southwest?
The best time to book a flight to San Diego with Southwest is 40 days before departure. On average, fares are higher if you book on the same day as departure.
When is the cheapest time to fly to San Diego with Southwest?
Users looking for the cheapest Southwest fares to San Diego should consider flying on Thursday afternoons, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday at noon, when prices are usually at their highest.
FAQs about flights to San Diego with Southwest
Reviews of Southwest
See what Cheapflights users have to say about their Southwest experience.
Overview
Reviews
Southwest
4,229 reviews
Overview
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Recent reviews
10.0
|Jul 2026Good
8.0
|Jun 2026One delay in a 2 layover flight=a good trip. The crew was great.
6.0
|Jun 2026The seats were super cramped and couldn’t move without hitting other passengers
8.0
|Jun 2026The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
10.0
|Jun 2026On time and no problems
1 out of 1410
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