$128+ Cheap flights from San José (SJO) to Illinois
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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from San José to Illinois 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.Cheap flight deals from San José to Illinois
Keep the following information in mind while searching for San José to Illinois flight deals. Data was last updated June 12, 2025.
Round-trip from | $269 (Delta) |
|---|---|
One-way from | $128 (Kiwi.com) |
Popular in | December |
Cheapest in | August |
Average price | $524 |
Good round-trip deal | $432 or less |
Good one-way deal | $242 or less |
Find flight deals from San José to Illinois
Cheapest flights from San José to IllinoisExplore the most affordable flight options available from San José to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
Explore the most affordable flight options available from San José to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 6/11. 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.
This Mytrip deal was found by Cheapflights users on 6/10. 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.
This Copa Airlines deal was found by Cheapflights users on 6/12. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
This CheapOair deal was found by Cheapflights users on 6/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier deal was found by Cheapflights users on 6/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 6/12. 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.
This American Airlines deal was found by Cheapflights users on 6/10. 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.
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Cheapflights Fare Finder
Customize your flight search to find flights from San José to Illinois 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 June 12, 2025.
Use the filters below to find and compare flights from San José to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
San JoséSt. Louis
SJO - STL
SJOSTL
San José Juan Santamaria Intl
Wed 9/3
1:35 pm-10:02 pm
1 stop7h 27m
Lambert-St Louis
Tue 10/14
6:00 am-11:48 am
1 stop6h 48m
San JoséSt. Louis
SJO - STL
SJOSTL
San José Juan Santamaria Intl
Wed 9/3
6:00 am-11:59 pm
1 stop16h 59m
Lambert-St Louis
Tue 10/14
5:28 am-1:17 pm
1 stop8h 49m
San JoséChicago
SJO - ORD
SJOORD
San José Juan Santamaria Intl
Tue 8/26
5:05 am-4:05 pm
1 stop10h 00m
Chicago O'Hare Intl
Sat 8/30
5:25 pm-11:35 pm
1 stop7h 10m
San JoséChicago
SJO - ORD
SJOORD
San José Juan Santamaria Intl
Wed 9/10
8:46 am-12:22 am
1 stop14h 36m
Chicago O'Hare Intl
Wed 9/24
3:07 pm-8:20 am
1 stop18h 13m
San JoséChicago
SJO - ORD
SJOORD
San José Juan Santamaria Intl
Tue 7/1
12:28 pm-11:45 pm
1 stop10h 17m
Chicago O'Hare Intl
Mon 7/7
7:39 pm-11:19 am
1 stop16h 40m
San JoséChicago
SJO - ORD
SJOORD
San José Juan Santamaria Intl
Fri 8/29
4:13 pm-11:05 am
1 stop17h 52m
Chicago O'Hare Intl
Tue 9/2
6:34 pm-11:18 am
1 stop17h 44m
San JoséChicago
SJO - ORD
SJOORD
San José Juan Santamaria Intl
Sat 8/16
1:47 pm-11:29 pm
1 stop8h 42m
Chicago O'Hare Intl
Sat 8/23
6:00 am-12:24 pm
1 stop7h 24m
San JoséSt. Louis
SJO - STL
SJOSTL
San José Juan Santamaria Intl
Thu 9/4
1:30 pm-2:19 pm
2 stops23h 49m
Lambert-St Louis
Tue 10/14
6:15 am-12:26 pm
1 stop7h 11m
San JoséChicago
SJO - ORD
SJOORD
San José Juan Santamaria Intl
Thu 8/14
2:15 pm-11:48 pm
1 stop8h 33m
Chicago O'Hare Intl
Mon 8/18
6:03 am-12:55 pm
1 stop7h 52m
San JoséChicago
SJO - MDW
SJOMDW
San José Juan Santamaria Intl
Tue 8/26
1:40 pm-11:20 pm
1 stop8h 40m
Chicago Midway
Sat 8/30
10:10 am-6:55 pm
1 stop9h 45m
Best time to book a flight from San José to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from San José with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from San José to Illinois
What is the cheapest month to book a flight from San José, San José Province to Illinois?
Currently, August is the cheapest month in which you can book a flight from San José, San José Province to Illinois (average of $245). Flying from San José, San José Province to Illinois in March is currently the most expensive (average of $321). 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 SJO to IL?
Find hourly flight availability from San José to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
When flying from San José, San José Province to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated June 12, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from San José to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
James,Apr 2025
LAX - SFO
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
James,Apr 2025
LAX - SFO
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
James,Apr 2025
LAX - SFO
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
James,Apr 2025
LAX - SFO
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
James,Apr 2025
LAX - SFO
Food
Boarding
Entertainment
Overall
Comfort
Crew
Reviews
James,Apr 2025
LAX - SFO
Related info for your journey
Find useful and relevant information for your journey from San José to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for San José to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from San José to Illinois
Discover the top 7 airlines that operate flights from San José to Illinois. 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 June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$264 | Average$412 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$314 | Average$485 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$318 | Average$488 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$340 | Average$481 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$425 | Average$527 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$434 | Average$563 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$437 | Average$617 | FlexibilityNo cancel fee | On-time69% |