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$234+ Cheap flights from Saint John (YSJ) 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 7/25. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$423
(Air Canada)

One-way from

$234
(Mytrip)
From Saint John to Illinois
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One-way flight from Saint John to Illinois
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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 June 12, 2025.

This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2011:35 amYSJ - ORD
1 stop5h 20mAir Canada
Mon 9/223:50 pmORD - YSJ
1 stop6h 01mAir Canada
Deal found 6/11$423
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2711:25 amYSJ - ORD
1 stop5h 30mUnited Airlines
Sun 8/316:00 amORD - YSJ
2 stops9h 45mUnited Airlines
Deal found 6/10$480
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/25:55 amYSJ - ORD
1 stop5h 14mMultiple Airlines
Mon 7/78:25 pmORD - YSJ
2 stops12h 24mMultiple Airlines
Deal found 6/10$523

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 June 12, 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

Sat 9/20

11:35 am-2:55 pm

1 stop5h 20m

Chicago O'Hare Intl

Mon 9/22

3:50 pm-11:51 pm

1 stop6h 01m

$423

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Wed 8/27

11:25 am-2:55 pm

1 stop5h 30m

Chicago O'Hare Intl

Sun 8/31

6:00 am-5:45 pm

2 stops9h 45m

$480

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Wed 7/2

5:55 am-9:09 am

1 stop5h 14m

Chicago O'Hare Intl

Mon 7/7

8:25 pm-10:49 am

2 stops12h 24m

$523

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Fri 7/25

10:45 am-9:30 pm

2 stops12h 45m

$234

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Fri 7/25

5:55 am-9:09 am

1 stop5h 14m

$244

Saint JohnChicago

YSJ - MDW

YSJMDW

Saint John

Fri 7/25

10:45 am-9:45 am

2 stops25h 00m

$327

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Sun 7/27

6:35 pm-2:16 pm

2 stops21h 41m

$405

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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

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.
United Airlines
7.4
Good
8,790 reviews

Overall

7.4

Entertainment

7.0

Comfort

7.3

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,790 reviews
United Airlines
7.4
Good
8,790 reviews

Overall

7.4

Entertainment

7.0

Comfort

7.3

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Air Canada
7.1
Good
9,537 reviews
United Airlines
7.4
Good
8,790 reviews

Overall

7.4

Entertainment

7.0

Comfort

7.3

Food

6.6

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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

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