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$165+ Cheap flights from Peoria, IL to San Diego (PIA - 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — SAN
May 23 — May 301
Sat 5/23
Sat 5/30
1 adult, Economy
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Cheap flight deals from Peoria to San Diego

Cheapest flights from Peoria to San Diego
Explore the most affordable flight options available from Peoria to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.

This United Airlines deal was found by Cheapflights users on 4/19. 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 6/35:33 pm
PIA
-
SAN
1 stop7h 01m
United Airlines
Tue 6/910:40 pm
SAN
-
PIA
1 stop9h 30m
United Airlines
Deal found 4/19$321
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Sat 5/236:58 pm
PIA
-
SAN
1 stop6h 41m
American Airlines
Sat 5/3010:45 pm
SAN
-
PIA
1 stop8h 30m
American Airlines
Deal found 4/20$322
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Sun 5/312:18 pm
PIA
-
SAN
1 stop21h 28m
Multiple Airlines
Thu 5/710:04 pm
SAN
-
PIA
2 stops34h 04m
Multiple Airlines
Deal found 4/20$335
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Wed 6/34:46 pm
PIA
-
SAN
1 stop7h 53m
American Airlines
Mon 6/810:45 pm
SAN
-
PIA
1 stop8h 35m
American Airlines
Deal found 4/20$345
This United Airlines deal was found by Cheapflights users on 4/21. 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 10/11:21 pm
PIA
-
SAN
2 stops8h 34m
United Airlines
Tue 10/612:37 pm
SAN
-
PIA
1 stop6h 10m
United Airlines
Deal found 4/21$350
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/134:46 pm
PIA
-
SAN
1 stop9h 13m
American Airlines
Sat 6/2010:45 pm
SAN
-
PIA
1 stop8h 29m
American Airlines
Deal found 4/22$369
This American Airlines deal was found by Cheapflights users on 4/19. 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.
Wed 6/34:46 pm
PIA
-
SAN
1 stop7h 53m
American Airlines
Tue 6/912:45 pm
SAN
-
PIA
2 stops9h 11m
American Airlines
Deal found 4/19$372
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1112:25 pm
PIA
-
SAN
1 stop8h 55m
American Airlines
Sat 7/1810:45 pm
SAN
-
PIA
1 stop8h 33m
American Airlines
Deal found 4/22$391
This United Airlines deal was found by Cheapflights users on 4/20. 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 10/15:20 pm
PIA
-
SAN
1 stop6h 37m
United Airlines
Thu 10/82:09 pm
SAN
-
PIA
1 stop8h 10m
United Airlines
Deal found 4/20$393
This United Airlines deal was found by Cheapflights users on 4/18. 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 4/225:35 pm
PIA
-
SAN
1 stop7h 24m
United Airlines
Sat 4/256:20 am
SAN
-
PIA
1 stop8h 24m
United Airlines
Deal found 4/18$413

Find flight deals from Peoria to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Peoria (PIA) 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 April 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$321
(United Airlines)

One-way from

$165
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$468
Provider with most accurate pricing for Greater Peoria-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Greater Peoria-San Diego flights.
Search Deals
From Greater Peoria to San Diego
Search Deals
One-way flight from Greater Peoria to San Diego
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Peoria 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 April 23, 2026.
Use the filters below to find and compare flights from Peoria to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Tue 9/1

1:21 pm-7:55 pm

2 stops8h 34m

San Diego

Tue 9/8

4:08 pm-12:22 am

1 stop6h 14m

$326

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Thu 10/1

5:20 pm-9:57 pm

1 stop6h 37m

San Diego

Tue 10/6

2:09 pm-12:19 am

1 stop8h 10m

$345

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sun 6/7

11:07 am-12:43 pm

2 stops27h 36m

San Diego

Wed 6/10

4:47 pm-8:18 pm

1 stop25h 31m

$362

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sat 5/30

1:21 pm-6:32 pm

1 stop7h 11m

San Diego

Tue 6/2

10:40 pm-10:10 am

1 stop9h 30m

$421

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sat 5/23

1:21 pm-11:54 pm

2 stops12h 33m

San Diego

Sat 5/30

10:40 pm-10:10 am

1 stop9h 30m

$427
Quickest round-trip

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sat 8/29

5:45 am-11:15 am

1 stop7h 30m

San Diego

Wed 9/2

4:08 pm-12:22 am

1 stop6h 14m

$445

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sat 7/25

1:21 pm-11:54 pm

2 stops12h 33m

San Diego

Sat 8/1

10:40 pm-10:09 am

1 stop9h 29m

$450

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Wed 7/29

1:21 pm-11:54 pm

2 stops12h 33m

San Diego

Sun 8/2

10:40 pm-10:09 am

1 stop9h 29m

$450
Cheapest one-way

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Mon 6/1

7:59 pm-9:12 pm

2 stops27h 13m

$165

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Mon 7/20

12:49 pm-8:58 pm

1 stop10h 09m

$195

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/20

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Compare providers for flights from Peoria 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 Peoria to San Diego in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 Peoria, Illinois-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Peoria, Illinois-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Peoria, Illinois-San Diego flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Peoria, Illinois-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub 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 Peoria, Illinois-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 Peoria to San Diego

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

What is the cheapest month to book a flight from Peoria, Illinois to San Diego?

Currently, August is the cheapest month in which you can book a flight from Peoria, Illinois to San Diego (average of $328). Flying from Peoria, Illinois to San Diego in December is currently the most expensive (average of $613). 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.

How much does it cost to fly round-trip from Peoria, Illinois to San Diego?

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 April 23, 2026.
See what other customers who have flown with United Airlines and American Airlines from Peoria to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,625 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.
United Airlines
7.4
Good
9,625 reviews
United Airlines
7.4
Good
9,625 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.
American Airlines
7.1
Good
11,647 reviews
United Airlines
7.4
Good
9,625 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Reviews

1 / 20
4.0
Okay

Simon,Jun 2024

LAS - LAX

Basic and no-frills. Late timing put pressure on disembarking and making connections.

Related info for your journey

Find useful and relevant information for your journey from Peoria 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 Peoria, Illinois to San Diego?

    For as low as $326, United Airlines can have you in San Diego from Peoria, Illinois in 8h 34m. The distance between Peoria, Illinois and San Diego is about 1610 mi.

  • What are the cheapest airlines flying from Peoria, Illinois to San Diego round-trip?

    Cheapflights users have booked flights from Peoria, Illinois to San Diego round-trip from $288. Another airline that can offer you cheap pricing is United Airlines. American Airlines is priced at 32% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Peoria 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 Peoria, Illinois to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Peoria, Illinois to San Diego (average of $328). Flying from Peoria, Illinois to San Diego in December is currently the most expensive (average of $613). 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
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Peoria to San Diego

Discover the top 2 airlines that operate flights from Peoria 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 April 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$408FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$430FlexibilityNo cancel feeOn-time71%

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