Find cheap United Airlines flights to San Diego
RDU — SAN
Aug 26 — Sep 21
Round-trip
1 adult, Economy
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Cheapest United Airlines flights from USA to San DiegoExplore the most affordable United Airlines flight options available from USA to San Diego. Find the lowest fares with prices last updated on July 27, 2026.
Explore the most affordable United Airlines flight options available from USA to San Diego. Find the lowest fares with prices last updated on July 27, 2026.
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Mon 8/1710:30 am
SFO
- SAN
Nonstop1h 43m
United Airlines
Thu 8/2012:41 pm
SAN
- SFO
Nonstop1h 46m
United Airlines
Deal found 7/26![United Airlines logo]()
$117
This United Airlines deal was found by Cheapflights users on 7/26. 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 8/2212:00 pm
SFO
- SAN
Nonstop1h 44m
United Airlines
Sun 8/236:20 am
SAN
- SFO
1 stop4h 50m
United Airlines
Deal found 7/26![United Airlines logo]()
$147
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:00 am
SFO
- SAN
Nonstop1h 43m
United Airlines
Sun 8/236:20 am
SAN
- SFO
Nonstop1h 43m
United Airlines
Deal found 7/24![United Airlines logo]()
$157
Best United Airlines flights from USA to San DiegoDiscover carefully curated United Airlines 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 United Airlines 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 United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:28 am
SFO
- SAN
Nonstop1h 50m
United Airlines
Fri 8/215:00 pm
SAN
- SFO
1 stop5h 55m
United Airlines
Deal found 7/22![United Airlines logo]()
$177
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:40 am
DEN
- SAN
Nonstop2h 30m
United Airlines
Sat 11/1412:39 pm
SAN
- DEN
Nonstop2h 29m
United Airlines
Deal found 7/22![United Airlines logo]()
$187
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:00 pm
SFO
- SAN
Nonstop1h 47m
United Airlines
Wed 8/1911:20 am
SAN
- SFO
Nonstop1h 46m
United Airlines
Deal found 7/24![United Airlines logo]()
$187
Direct United Airlines flights from USA to San DiegoExplore non-stop United Airlines 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 United Airlines 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 United Airlines deal was found by Cheapflights users on 7/25. 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.
Mon 8/1710:30 am
SFO
- SAN
Nonstop1h 43m
United Airlines
Thu 8/2012:41 pm
SAN
- SFO
Nonstop1h 46m
United Airlines
Deal found 7/25![United Airlines logo]()
$117
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Fri 9/410:42 pm
SFO
- SAN
Nonstop1h 47m
United Airlines
Tue 9/811:19 am
SAN
- SFO
Nonstop1h 46m
United Airlines
Deal found 7/26![United Airlines logo]()
$137
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/288:45 pm
SFO
- SAN
Nonstop1h 42m
United Airlines
Tue 12/19:30 am
SAN
- SFO
Nonstop1h 46m
United Airlines
Deal found 7/24![United Airlines logo]()
$152
Last-minute United Airlines flights from USA to San DiegoDiscover last-minute United Airlines flight deals from USA to San Diego. Data last updated July 27, 2026 and is based on user searches.
Discover last-minute United Airlines flight deals from USA to San Diego. Data last updated July 27, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Mon 8/1710:30 am
SFO
- SAN
Nonstop1h 43m
United Airlines
Thu 8/2012:41 pm
SAN
- SFO
Nonstop1h 46m
United Airlines
Deal found 7/26![United Airlines logo]()
$117
This United Airlines deal was found by Cheapflights users on 7/26. 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 8/2212:00 pm
SFO
- SAN
Nonstop1h 44m
United Airlines
Sun 8/236:20 am
SAN
- SFO
1 stop4h 50m
United Airlines
Deal found 7/26![United Airlines logo]()
$147
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:00 am
SFO
- SAN
Nonstop1h 43m
United Airlines
Sun 8/236:20 am
SAN
- SFO
Nonstop1h 43m
United Airlines
Deal found 7/24![United Airlines logo]()
$157
One-way United Airlines flights to San DiegoSearch for one-way United Airlines flight options to San Diego. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
Search for one-way United Airlines flight options to San Diego. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Wed 8/196:55 pm
SFO
- SAN
Nonstop1h 50m
United Airlines
Deal found 7/26![United Airlines logo]()
$59
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/3110:30 am
SFO
- SAN
Nonstop1h 43m
United Airlines
Deal found 7/22![United Airlines logo]()
$69
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:00 am
SFO
- SAN
Nonstop1h 43m
United Airlines
Deal found 7/24![United Airlines logo]()
$79
Flights to San Diego with United Airlines at a glance
Find detailed information about United Airlines flights from USA to San Diego. Explore the options provided by United Airlines to plan your journey from USA to San Diego. Data last updated July 27, 2026.
Popular in | June |
|---|---|
Cheapest in | January |
Average price | $371 |
Round-trip from | $117 |
One-way from | $59 |
Good round-trip deal | $334 or less |
Good one-way deal | $232 or less |
Cheapflights Insights
Find cheap United Airlines flights to San Diego
US0-SAN
SFO-SAN
DEN-SAN
How long is the flight to San Diego with United Airlines?
On average, United Airlines 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.
United Airlines weekly flight availability to San Diego
The most flights to San Diego operated by United Airlines are scheduled on a Sunday (47 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (33 on average).
When is the best time to book a flight to San Diego with United Airlines?
The best time to book a flight to San Diego with United Airlines is 20 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 United Airlines?
Users looking for the cheapest United Airlines fares to San Diego should consider flying on Tuesday at noon, when prices are typically cheapest. Budget-minded travellers will want to avoid Sunday afternoons, when prices are usually at their highest.
FAQs about flights to San Diego with United Airlines
Reviews of United Airlines
See what Cheapflights users have to say about their United Airlines experience.
Overview
Reviews
United Airlines
10,000 reviews
Overview
Food
6.6
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Crew
8.1
Recent reviews
8.0
|Jul 2026The crew was polite and professional.
8.0
|Jul 2026Getting to the gate on landing was slow
6.0
|Jun 2026It should not be delayed by 2 hours. I missed the important event due to this
8.0
|Jun 2026It was as expected
10.0
|Jun 2026Overall good
1 out of 3334
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