Find flights
When to book
Airlines
FAQs

Cheap flights from Saint John to Chicago O'Hare Intl Airport from C$ 309

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
YSJ — ORD
3 Aug — 10 Aug1
1 adult

Cheap flight deals from St John to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from St John (YSJ) to O'Hare Intl (ORD). 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 29 July 2025.

Round-trip from

C$ 531

One-way from

C$ 309
Air Canada
  • Air Canada
  • 12/9-19/9
  • 2 total stops
  • 11h 41m total
  • Saint John to Chicago
Search Deals
Air Canada
  • Air Canada
  • 3/9
  • 1 total stop
  • 6h 58m total
  • Saint John to Chicago
Search Deals

Find flight deals from St John to O'Hare Intl

Cheapest flights from St John to O'Hare Intl
Explore the most affordable flight options available from St John to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 July 2025.

Sun 24/85:55 a.m.YSJ - ORD
1 stop5h 14mAir Canada
Tue 26/83:50 p.m.ORD - YSJ
1 stop7h 10mAir Canada
Deal found 28/7C$ 1,130
Sun 24/85:55 a.m.YSJ - ORD
1 stop5h 14mUnited Airlines
Tue 26/87:00 a.m.ORD - YSJ
2 stops8h 40mUnited Airlines
Deal found 28/7C$ 1,143

Cheapflights Fare Finder

 
Customize your flight search to find flights from St John to O'Hare Intl 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 629,999 searches. Data last updated 29 July 2025.
Use the filters below to find and compare flights from Saint John to Chicago O'Hare Intl Airport that are best for you.

Fly from

St John

Fly to

O'Hare Intl

Route

Depart

Return

Price

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Fri 12/9

11:35 a.m.-2:55 p.m.

1 stop5h 20m

Chicago O'Hare Intl

Fri 19/9

3:50 p.m.-12:11 a.m.

1 stop6h 21m

C$ 531

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Sun 7/9

10:45 a.m.-10:43 a.m.

3 stops25h 58m

Chicago O'Hare Intl

Sun 19/10

12:05 p.m.-10:00 a.m.

2 stops19h 55m

C$ 661

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Fri 12/9

11:35 a.m.-8:15 p.m.

2 stops10h 40m

Chicago O'Hare Intl

Fri 19/9

3:50 p.m.-12:11 a.m.

1 stop6h 21m

C$ 761

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Wed 3/9

5:55 a.m.-10:53 a.m.

1 stop6h 58m

C$ 309

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Wed 3/9

10:45 a.m.-6:50 p.m.

2 stops34h 05m

C$ 405

Saint JohnChicago

YSJ - ORD

YSJORD

Saint John

Thu 28/8

6:40 p.m.-4:43 p.m.

2 stops24h 03m

C$ 580

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Best time to book a flight from St John to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl 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.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated 29 July 2025.
Read through reviews of airlines operating flights from Saint John to Chicago O'Hare Intl Airport, such as United Airlines and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,896 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

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
8,896 reviews
United Airlines
7.4
Good
8,896 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

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
9,826 reviews
United Airlines
7.4
Good
8,896 reviews
Check prices

Comfort

7.3

Boarding

7.7

Overall

7.4

Entertainment

7.1

Food

6.6

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 O'Hare Intl. 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 Chicago O'Hare Intl?

    For a flight from Saint John to Chicago O'Hare Intl, you will be flying from Saint John. Saint John (YSJ) is just 15.1 km from the centre of the city. Saint John is the only Saint John airport and it handles 0 outbound flights to Chicago O'Hare Intl per day. 0 airlines have flights to Chicago O'Hare Intl from Saint John on a regular basis.

  • Can I find deals for flights from St John to O'Hare Intl that include hotel bookings?

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

  • How can I find direct flights from St John to O'Hare Intl?

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

  • Can I find deals for business class flights from St John to O'Hare Intl?

    Yes. Cheapflights offers flight deals from St John to O'Hare Intl 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 Chicago O'Hare Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Saint John to Chicago O'Hare Intl Airport (average of C$ 261). Flying from Saint John to Chicago O'Hare Intl Airport in March is currently the most expensive (average of C$ 352). 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

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Elk Grove Village
Evanston
Des Plaines
Skokie
Downers Grove
Naperville
Bolingbrook
Romeoville

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 O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
Moncton to O'Hare Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St John to O'Hare Intl?

Deals for St John to O'Hare Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from St John to O'Hare Intl?

Cheapflights simply makes it quick and affordable to book flights from St John to O'Hare Intl by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from St John to O'Hare Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from St John to O'Hare Intl flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from St John to O'Hare Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to O'Hare Intl from St John today and book when prices fit your budget.

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.