$374+ Cheap flights from Decatur, IL to San Diego (DEC - 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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — SAN
Aug 3 — Aug 101
1 adult, Economy
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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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Decatur to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Decatur (DEC) 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 July 29, 2025.
Round-trip from | $374 (United Airlines) |
|---|
Find flight deals from Decatur to San Diego
Cheapest flights from Decatur to San DiegoExplore the most affordable flight options available from Decatur to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.
Explore the most affordable flight options available from Decatur to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.
This United Airlines deal was found by Cheapflights users on 7/27. 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 11/199:49 amDEC - SAN
1 stop8h 13mUnited Airlines
Sun 11/2310:45 pmSAN - DEC
1 stop8h 03mUnited Airlines
Deal found 7/27![United Airlines logo]()
$374
Cheapflights Fare Finder
Customize your flight search to find flights from Decatur 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 July 29, 2025.
Use the filters below to find and compare flights from Decatur to San Diego that are best for you.
Fly from
Decatur
Fly to
San Diego
Route
Depart
Return
Price
DecaturSan Diego
DEC - SAN
DECSAN
Decatur Arpt
Wed 11/19
9:49 am-4:02 pm
1 stop8h 13m
San Diego
Sun 11/23
10:45 pm-8:48 am
1 stop8h 03m
$374
Best time to book a flight from Decatur to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Decatur 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 Decatur to San Diego
What is the cheapest month to book a flight from Decatur, Illinois to San Diego?
Currently, August is the cheapest month in which you can book a flight from Decatur, Illinois to San Diego (average of $286). Flying from Decatur, 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 July 29, 2025.
Read reviews from past customers who have flown United Airlines from Decatur 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.
Food
6.6
Comfort
7.3
Overall
7.4
Crew
8.1
Boarding
7.7
Entertainment
7.1
Reviews
1 / 20
4.0
OkaySimon,Jun 2024
LAS - LAX
Food
6.6
Comfort
7.3
Overall
7.4
Crew
8.1
Boarding
7.7
Entertainment
7.1
Reviews
1 / 20
4.0
OkaySimon,Jun 2024
LAS - LAX
Related info for your journey
Find useful and relevant information for your journey from Decatur to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
Chula Vista
Coronado
Poway
National City
Lemon Grove
Imperial Beach
La Mesa
Alpine
Santee
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Alternative routes for Decatur to San Diego
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Decatur to San Diego
Discover the top airline that operate flights from Decatur 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 July 29, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$373 | Average$600 | FlexibilityNo cancel fee | On-time69% |