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$175+ 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 12/21. Fares are subject to change and may not be available on all flights or dates of travel.
PIA — SAN
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
1 adult, Economy
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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

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 December 3, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/1. 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 12/153:08 pmPIA - SAN
2 stops28h 45mMultiple Airlines
Thu 12/189:14 pmSAN - PIA
1 stop12h 26mMultiple Airlines
Deal found 12/1$314
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/315:19 pmPIA - SAN
1 stop7h 32mUnited Airlines
Mon 1/58:45 pmSAN - PIA
2 stops11h 25mUnited Airlines
Deal found 12/2$329
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/1310:45 amPIA - SAN
1 stop6h 45mUnited Airlines
Wed 12/249:45 pmSAN - PIA
2 stops12h 35mUnited Airlines
Deal found 12/1$374
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/221:20 pmPIA - SAN
2 stops11h 12mUnited Airlines
Mon 12/297:00 amSAN - PIA
1 stop7h 43mUnited Airlines
Deal found 12/2$409
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/315:19 pmPIA - SAN
1 stop7h 32mUnited Airlines
Wed 1/71:00 pmSAN - PIA
1 stop5h 47mUnited Airlines
Deal found 12/2$414
This American Airlines deal was found by Cheapflights users on 12/1. 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.
Tue 12/166:32 amPIA - SAN
1 stop8h 09mAmerican Airlines
Sat 12/203:03 pmSAN - PIA
1 stop6h 25mAmerican Airlines
Deal found 12/1$455

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 December 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$259
(American Airlines)

One-way from

$175
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$613
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. 13% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 3, 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

Thu 1/22

8:35 am-3:04 pm

1 stop8h 29m

San Diego

Sun 1/25

7:00 am-4:43 pm

1 stop7h 43m

$289

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Wed 4/22

1:25 pm-6:40 pm

1 stop7h 15m

San Diego

Tue 4/28

7:00 am-4:45 pm

1 stop7h 45m

$289

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sat 1/10

8:35 am-12:59 pm

1 stop6h 24m

San Diego

Sun 1/25

7:00 am-4:43 pm

1 stop7h 43m

$289

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sat 1/17

7:39 am-6:31 pm

2 stops12h 52m

San Diego

Sat 1/24

1:19 pm-9:43 pm

1 stop6h 24m

$294

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sun 1/18

10:45 am-6:44 pm

2 stops9h 59m

San Diego

Sun 1/25

7:00 am-4:43 pm

1 stop7h 43m

$294

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Thu 1/1

5:19 pm-10:51 pm

1 stop7h 32m

San Diego

Tue 1/6

10:52 am-9:39 pm

1 stop8h 47m

$318

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Thu 1/1

5:19 pm-10:51 pm

1 stop7h 32m

San Diego

Wed 1/7

1:00 pm-8:47 pm

1 stop5h 47m

$318

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Sun 12/21

8:45 pm-1:15 pm

1 stop18h 30m

$175

PeoriaSan Diego

PIA - SAN

PIASAN

Greater Peoria

Tue 12/9

11:23 am-3:38 pm

3 stops54h 15m

$315

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 12/1

Showing 1-10 of 12 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Peoria, Illinois-San Diego flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

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 November 28, 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, July is the cheapest month in which you can book a flight from Peoria, Illinois to San Diego (average of $121). Flying from Peoria, Illinois to San Diego in March is currently the most expensive (average of $311). 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 December 3, 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
9,063 reviews

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

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
9,063 reviews
United Airlines
7.4
Good
9,063 reviews

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

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
7.2
Good
11,044 reviews
United Airlines
7.4
Good
9,063 reviews

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

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 $289, United Airlines can have you in San Diego from Peoria, Illinois in 8h 29m. 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 American Airlines. United Airlines is priced at 34% 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, July is the cheapest month in which you can book a flight from Peoria, Illinois to San Diego (average of $121). Flying from Peoria, Illinois to San Diego in March is currently the most expensive (average of $311). 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
Coronado
La Mesa
Poway
Lemon Grove
Julian
National City

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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 December 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$486FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$288Average$402FlexibilityNo cancel feeOn-time71%

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