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$42+ Cheap flights from Irvine, CA to San Diego (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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SAN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Irvine to San Diego are usually found in January or July, booked 56 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Irvine to San Diego

Keep the following information in mind while searching for Irvine to San Diego flight deals. Data was last updated September 17, 2025.

Round-trip from

$86
(Cheapflightsfares)

One-way from

$42
(Kiwi.com)

Popular in

September

Cheapest in

January

Average price

$259
From Irvine to San Diego
Search Deals
One-way flight from Irvine to San Diego
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Highest demand for flights based on searches. 10% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 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 Irvine to San Diego

Cheapest flights from Irvine to San Diego
Explore the most affordable flight options available from Irvine to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:15 amLAX - SAN
1 stop6h 16mSpirit Airlines
Tue 9/301:35 pmSAN - LAX
1 stop5h 20mSpirit Airlines
Deal found 9/15$86
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/38:55 pmLAX - SAN
1 stop10h 34mSpirit Airlines
Sat 10/41:35 pmSAN - LAX
1 stop10h 21mSpirit Airlines
Deal found 9/16$87
This Expedia deal was found by Cheapflights users on 9/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:15 amLAX - SAN
1 stop6h 16mSpirit Airlines
Fri 10/36:15 amSAN - LAX
1 stop4h 41mSpirit Airlines
Deal found 9/16$93
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:50 pmLAX - SAN
1 stop3h 44mSpirit Airlines
Wed 9/246:15 amSAN - LAX
1 stop4h 41mSpirit Airlines
Deal found 9/15$98
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:50 pmLAX - SAN
1 stop3h 44mSpirit Airlines
Mon 9/296:15 amSAN - LAX
1 stop7h 18mSpirit Airlines
Deal found 9/15$107
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:36 amLAX - SAN
1 stop12h 50mSpirit Airlines
Thu 10/26:15 amSAN - LAX
1 stop4h 41mSpirit Airlines
Deal found 9/15$111
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:15 amLAX - SAN
1 stop6h 16mSpirit Airlines
Tue 9/231:35 pmSAN - LAX
1 stop5h 20mSpirit Airlines
Deal found 9/15$112
This Kiwi.com deal was found by Cheapflights users on 9/17. 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.
Mon 9/293:32 pmLAX - SAN
1 stop20h 59mMultiple Airlines
Thu 10/26:15 amSAN - LAX
1 stop4h 41mMultiple Airlines
Deal found 9/17$118
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Tue 9/306:15 amLAX - SAN
1 stop6h 16mMultiple Airlines
Mon 10/62:52 pmSAN - LAX
1 stop22h 40mMultiple Airlines
Deal found 9/16$122
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/269:36 amLAX - SAN
1 stop12h 50mSpirit Airlines
Fri 10/36:15 amSAN - LAX
1 stop4h 41mSpirit Airlines
Deal found 9/15$125
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Tue 9/236:15 amLAX - SAN
1 stop6h 16mMultiple Airlines
Wed 9/248:00 amSAN - LAX
1 stop5h 33mMultiple Airlines
Deal found 9/15$127
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Tue 10/143:48 pmLAX - SAN
1 stop5h 32mFrontier
Tue 10/218:00 amSAN - LAX
1 stop11h 53mFrontier
Deal found 9/16$132

Cheapflights Fare Finder

 
Customize your flight search to find flights from Irvine 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 September 17, 2025.
Use the filters below to find and compare flights from Irvine to San Diego that are best for you.

Fly from

Irvine

Fly to

San Diego

Route

Depart

Return

Price

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Tue 9/23

6:15 am-12:31 pm

1 stop6h 16m

San Diego

Thu 9/25

6:15 am-1:33 pm

1 stop7h 18m

$140

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sun 9/21

8:14 pm-11:17 pm

1 stop27h 03m

San Diego

Tue 9/23

6:15 am-10:56 am

1 stop4h 41m

$168

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Mon 10/20

10:39 pm-11:41 pm

Nonstop1h 02m

San Diego

Mon 10/27

8:40 pm-9:50 pm

Nonstop1h 10m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 10/23

8:20 am-9:20 am

Nonstop1h 00m

San Diego

Sun 10/26

7:48 pm-9:03 pm

Nonstop1h 15m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sat 10/25

6:48 pm-7:46 pm

Nonstop0h 58m

San Diego

Sun 10/26

6:15 am-7:18 am

Nonstop1h 03m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sat 10/25

8:20 am-9:20 am

Nonstop1h 00m

San Diego

Sun 10/26

10:00 am-11:14 am

Nonstop1h 14m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 11/13

6:24 pm-7:19 pm

Nonstop0h 55m

San Diego

Mon 11/17

10:00 am-11:14 am

Nonstop1h 14m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 11/26

9:17 am-10:21 am

Nonstop1h 04m

San Diego

Sat 11/29

6:15 am-7:18 am

Nonstop1h 03m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sat 10/11

9:17 am-10:27 am

Nonstop1h 10m

San Diego

Sun 10/12

11:08 am-12:20 pm

Nonstop1h 12m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Tue 11/25

8:19 am-9:19 am

Nonstop1h 00m

San Diego

Sat 11/29

7:59 pm-9:13 pm

Nonstop1h 14m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 22 results
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2
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Best time to book a flight from Irvine to San Diego

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

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

Use this chart to determine the optimal time to book a round-trip flight from Irvine to San Diego. Price data was last updated on September 12, 2025.

To ensure you get the cheapest price possible for a flight from Irvine to San Diego, you should look to book at least 56 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Irvine to San Diego (average of $286). Flying from Irvine to San Diego in March is currently the most expensive (average of $366). 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 IR9 to SAN?

Find hourly flight availability from Irvine 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 September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Irvine to San Diego as you normally would.

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

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

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

Weekly flight availability from Irvine to San Diego

Explore weekly flight availability from Irvine to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 17, 2025.

The most flights from IR9 to SAN are scheduled on a Monday (45 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

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 September 17, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and Spirit Airlines from Irvine to San Diego. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Spirit Airlines
6.3
Okay
8,023 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Irvine to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Diego from Irvine?

    Most people fly into San Diego (SAN) if they book a flight to San Diego from Irvine. On average, San Diego has 38 inbound flights from Irvine per day from 3 airlines. San Diego is conveniently located just 2.6 mi from San Diego’s city center.

  • How popular is this Irvine to San Diego flight route?

    Within the past month, 1 users have taken a look at flights from Irvine to San Diego.

  • How long is the flight from Irvine to San Diego?

    Departing from Irvine to San Diego will take you 1h. Airlines will cover a distance of 109 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most reliable airlines from Irvine to San Diego?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Irvine to San Diego on time: ITA Airways (98%), Aeromexico (97%), Copa Airlines (96%).

  • What are the cheapest flights from Irvine to San Diego?

    Looking at all options, your cheapest flight can be booked for $123. While the most popular route (Los Angeles - San Diego) can be booked for $93 on average, our data indicates $321 when flying from Irvine to San Diego.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Irvine to San Diego (average of $286). Flying from Irvine to San Diego in March is currently the most expensive (average of $366). 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
La Mesa
Poway
Lemon Grove
Coronado
Imperial Beach
National City

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Irvine to San Diego

Discover the top 3 airlines that operate flights from Irvine 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$64Average$123FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$179Average$244FlexibilityNo cancel feeOn-time69%
DeltaCheapest$179Average$203FlexibilityNo cancel feeOn-timeN/A

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