HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$486+ Cheap flights from Saint John (YSJ) to Illinois

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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — ORD
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St John 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 St John to Illinois

Keep the following information in mind while searching for St John to Illinois flight deals. Data was last updated August 13, 2025.

Round-trip from

$486
(Air Canada)
From Saint John to Illinois
Search Deals

Find flight deals from St John to Illinois

Cheapest flights from St John to Illinois
Explore the most affordable flight options available from St John to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 13, 2025.

This Air Canada deal was found by Cheapflights users on 8/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/255:55 amYSJ - ORD
1 stop5h 13mAir Canada
Thu 10/23:50 pmORD - YSJ
1 stop6h 01mAir Canada
Deal found 8/10$486
This United Airlines deal was found by Cheapflights users on 8/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/255:55 amYSJ - ORD
1 stop5h 13mUnited Airlines
Thu 10/26:00 amORD - YSJ
2 stops9h 40mUnited Airlines
Deal found 8/10$555
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Thu 9/2512:00 pmYSJ - ORD
3 stops35h 58mMultiple Airlines
Thu 10/211:57 amORD - YSJ
2 stops20h 03mMultiple Airlines
Deal found 8/10$720
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Thu 9/2512:00 pmYSJ - MDW
3 stops22h 39mMultiple Airlines
Thu 10/29:20 amMDW - YSJ
2 stops22h 40mMultiple Airlines
Deal found 8/10$725

Cheapflights Fare Finder

 
Customize your flight search to find flights from St John 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 August 13, 2025.
Use the filters below to find and compare flights from Saint John to Illinois that are best for you.

Fly from

St John

Fly to

Illinois

Route

Depart

Return

Price

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Thu 9/25

5:55 am-9:08 am

1 stop5h 13m

Chicago O'Hare Intl

Thu 10/2

3:50 pm-11:51 pm

1 stop6h 01m

$486

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Thu 9/25

5:55 am-9:08 am

1 stop5h 13m

Chicago O'Hare Intl

Thu 10/2

6:00 am-5:40 pm

2 stops9h 40m

$555

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Thu 9/25

12:00 pm-9:58 pm

3 stops35h 58m

Chicago O'Hare Intl

Thu 10/2

11:57 am-10:00 am

2 stops20h 03m

$720

Saint JohnChicago

YSJ - MDW

YSJMDW

Saint John

Thu 9/25

12:00 pm-8:39 am

3 stops22h 39m

Chicago Midway

Thu 10/2

9:20 am-10:00 am

2 stops22h 40m

$725

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/10

Best time to book a flight from St John to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from St John 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 Saint John to Illinois
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from St John to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Saint John to Illinois?

    Saint John (YSJ) is the airport you will fly out of if you book a flight from Saint John to Illinois. It is only a 9.4 mi journey to Saint John (YSJ) from Saint John’s city center.

  • Can I find deals for flights from St John to Illinois that include hotel bookings?

    Yes. In addition to deals on St John to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St John to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St John to Illinois.

  • Can I find deals for business class flights from St John to Illinois?

    Yes. Cheapflights offers flight deals from St John to Illinois 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 Saint John to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Saint John to Illinois (average of $245). Flying from Saint John 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.

See more FAQs

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 St John to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Moncton to Fort Lauderdale flights
Moncton to San Diego flights
Moncton to Las Vegas flights
Fredericton to Orlando flights
Moncton to Boston flights
Moncton to Orlando flights
Moncton to Tampa flights
Moncton to Newark flights
Moncton to O'Hare Intl flights
Moncton to Hobby flights
Fredericton to Las Vegas flights
Moncton to George Bush Intcntl flights
Moncton to Miami flights
Moncton to Denver flights
St John to San Diego flights
Moncton to John F Kennedy Intl flights
Moncton to Dulles Intl flights
Moncton to Atlanta flights
Fredericton to John F Kennedy Intl flights
Fredericton to Newark flights
St John to Las Vegas flights
Fredericton to LaGuardia flights
Fredericton to Los Angeles flights
Moncton to LaGuardia flights
St John to Boston flights
St John to Atlanta flights
St John to Honolulu flights
St John to Denver flights
St John to Jacksonville flights
St John to Los Angeles flights
St John to O'Hare Intl flights
St John to Portland flights
St John to Providence flights
Fredericton to Nashville flights
Moncton to Fort Myers flights
Moncton to New Orleans flights
Moncton to Honolulu flights
Moncton to Dallas/Fort Worth flights
Moncton to Charlotte flights
Fredericton to San Francisco flights
Fredericton to Savannah flights
Fredericton to New Orleans flights
Fredericton to George Bush Intcntl flights

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.