HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$314+ Cheap flights from Peoria, IL to San Diego (PIA - SAN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — SAN
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Peoria to San Diego with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Greater Peoria to San Diego are usually found in August or April, booked 41 days in advance, depart on a Thursday or Wednesday and return on a Saturday

Cheap 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 September 17, 2025.

Round-trip from

$314
(American Airlines)

Popular in

February

Cheapest in

August

Average price

$353
From Greater Peoria to San Diego
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($123 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find 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 September 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 10/25:30 amPIA - SAN
1 stop10h 12mAmerican Airlines
Sat 10/41:02 pmSAN - PIA
1 stop8h 09mAmerican Airlines
Deal found 9/14$339
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/710:25 amPIA - SAN
1 stop12h 23mAmerican Airlines
Wed 11/126:19 amSAN - PIA
1 stop10h 40mAmerican Airlines
Deal found 9/16$343
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:00 amPIA - SAN
1 stop8h 11mAmerican Airlines
Mon 11/103:05 pmSAN - PIA
1 stop6h 44mAmerican Airlines
Deal found 9/15$354
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.
Wed 10/11:26 pmPIA - SAN
1 stop12h 08mMultiple Airlines
Sun 10/56:35 amSAN - PIA
2 stops26h 34mMultiple Airlines
Deal found 9/16$368
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:18 pmPIA - SAN
1 stop7h 02mUnited Airlines
Wed 12/312:50 pmSAN - PIA
1 stop6h 06mUnited Airlines
Deal found 9/16$379
This United Airlines deal was found by Cheapflights users on 9/14. 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 11/131:20 pmPIA - SAN
1 stop7h 30mUnited Airlines
Sun 11/1610:00 pmSAN - PIA
2 stops12h 39mUnited Airlines
Deal found 9/14$384
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/301:20 pmPIA - SAN
1 stop7h 30mUnited Airlines
Sun 11/28:40 pmSAN - PIA
2 stops11h 36mUnited Airlines
Deal found 9/14$409
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:00 amPIA - SAN
1 stop7h 40mUnited Airlines
Sat 10/410:46 amSAN - PIA
1 stop8h 41mUnited Airlines
Deal found 9/15$429

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 September 17, 2025.
Use the filters below to find and compare flights from Peoria to San Diego that are best for you.

Fly from

Peoria

Fly to

San Diego

Route

Depart

Return

Price

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Mon 2/23

10:46 am-5:54 pm

1 stop9h 08m

San Diego

Thu 3/5

6:42 am-3:44 pm

1 stop7h 02m

$314

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Thu 1/1

6:00 am-2:13 pm

1 stop10h 13m

San Diego

Sun 1/11

8:07 am-9:25 pm

1 stop11h 18m

$337

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Thu 10/2

5:30 am-1:42 pm

1 stop10h 12m

San Diego

Sat 10/4

1:02 pm-11:11 pm

1 stop8h 09m

$339

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Wed 10/1

11:24 am-6:03 pm

1 stop8h 39m

San Diego

Sun 10/5

10:38 pm-9:27 am

1 stop8h 49m

$339

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Fri 11/7

10:25 am-8:48 pm

1 stop12h 23m

San Diego

Wed 11/12

6:19 am-6:59 pm

1 stop10h 40m

$343

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Thu 10/2

5:30 am-1:42 pm

1 stop10h 12m

San Diego

Mon 10/6

12:40 pm-11:05 pm

2 stops8h 25m

$344

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Wed 10/1

1:26 pm-11:34 pm

1 stop12h 08m

San Diego

Sun 10/5

6:35 am-11:09 am

2 stops26h 34m

$368

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sat 1/3

5:19 pm-10:51 pm

1 stop7h 32m

$388

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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

How far ahead should I book a flight from Peoria, Illinois to San Diego?

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

The best time to book flights from Peoria, Illinois to San Diego is 40 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 $286). Flying from Peoria, Illinois 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.

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.
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
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

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
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

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
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

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 $314, American Airlines can have you in San Diego from Peoria, Illinois in 9h 08m. 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 $283. Another airline that can offer you cheap pricing is United Airlines. American Airlines is priced at 33% 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 $286). Flying from Peoria, Illinois 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Peoria to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Las Vegas flights
O'Hare Intl to Los Angeles flights
Midway to Las Vegas flights
O'Hare Intl to San Francisco flights
O'Hare Intl to Ontario flights
O'Hare Intl to Santa Ana flights
Midway to Los Angeles flights
St. Louis to Las Vegas flights
O'Hare Intl to San Diego flights
O'Hare Intl to Palm Springs flights
Midway to San Francisco flights
O'Hare Intl to Burbank flights
O'Hare Intl to Sacramento flights
O'Hare Intl to San Jose flights
Midway to San Diego flights
St. Louis to Los Angeles flights
Midway to Santa Ana flights
Midway to Ontario flights
Rockford to Las Vegas flights
St. Louis to San Francisco flights
O'Hare Intl to Oakland flights
O'Hare Intl to Reno flights
Midway to Palm Springs flights
St. Louis to San Diego flights
Midway to San Jose flights
O'Hare Intl to Long Beach flights
Midway to Oakland flights
O'Hare Intl to Fresno flights
St. Louis to Ontario flights
Midway to Sacramento flights
Peoria to Las Vegas flights
Moline to Las Vegas flights
St. Louis to Santa Ana flights
O'Hare Intl to Santa Barbara flights
St. Louis to Palm Springs flights
St. Louis to Sacramento flights
Bloomington to Las Vegas flights
Midway to Reno flights
St. Louis to Long Beach flights
Midway to Burbank flights
Peoria to San Francisco flights
O'Hare Intl to San Luis Obispo flights
Moline to Los Angeles flights
O'Hare Intl to Monterey flights
Evansville to Las Vegas flights
Moline to San Diego flights
St. Louis to San Jose flights
Moline to Ontario flights
Midway to Long Beach flights

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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$283Average$408FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$471FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.