Find flights
When to book
Airlines
FAQs

Cheap flights from Hamilton, ON to Illinois from C$ 197

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
YHM — ORD
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Hamilton to Illinois

Keep the following information in mind while searching for Hamilton to Illinois flight deals. Data was last updated 15 September 2025.

Round-trip from

C$ 354

One-way from

C$ 197

Popular in

December

Cheapest in

July

Average price

C$ 352
WestJet
  • WestJet
  • 25/10-26/10
  • 2 total stops
  • 37h 40m total
  • Hamilton to Illinois
Search Deals
WestJet
  • WestJet
  • 18/10
  • 1 total stop
  • 11h 43m total
  • Hamilton to Illinois
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (C$ 42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Hamilton to Illinois

Cheapest flights from Hamilton to Illinois
Explore the most affordable flight options available from Hamilton to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 September 2025.

Thu 23/106:00 a.m.YHM - ORD
1 stop11h 43mWestJet
Sun 26/102:20 p.m.ORD - YHM
1 stop25h 57mWestJet
Deal found 12/9C$ 354
Fri 17/106:00 a.m.YHM - ORD
1 stop11h 43mWestJet
Sun 26/102:20 p.m.ORD - YHM
1 stop25h 57mWestJet
Deal found 14/9C$ 356
Sun 12/106:00 a.m.YHM - ORD
1 stop11h 43mWestJet
Sun 19/105:30 p.m.ORD - YHM
1 stop30h 10mWestJet
Deal found 14/9C$ 379
Sun 12/106:00 a.m.YHM - ORD
1 stop11h 43mMultiple Airlines
Sun 19/105:30 p.m.ORD - YHM
2 stops29h 29mMultiple Airlines
Deal found 14/9C$ 411
Sat 18/106:00 a.m.YHM - ORD
1 stop11h 43mWestJet
Sat 25/105:30 p.m.ORD - YHM
1 stop22h 47mWestJet
Deal found 14/9C$ 425
Thu 16/1012:10 p.m.YHM - ORD
1 stop29h 33mMultiple Airlines
Mon 20/109:54 p.m.ORD - YHM
2 stops41h 50mMultiple Airlines
Deal found 14/9C$ 494
Tue 28/107:55 p.m.YHM - ORD
3 stops26h 38mMultiple Airlines
Tue 4/116:40 a.m.ORD - YHM
2 stops33h 37mMultiple Airlines
Deal found 13/9C$ 757

Cheapflights Fare Finder

 
Customize your flight search to find flights from Hamilton 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 629,999 searches. Data last updated 15 September 2025.
Use the filters below to find and compare flights from Hamilton to Illinois that are best for you.

Fly from

Hamilton

Fly to

Illinois

Route

Depart

Return

Price

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Sat 25/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Chicago O'Hare Intl

Sun 26/10

2:20 p.m.-5:17 p.m.

1 stop25h 57m

C$ 354

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Thu 23/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Chicago O'Hare Intl

Sun 26/10

2:20 p.m.-5:17 p.m.

1 stop25h 57m

C$ 354

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Fri 17/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Chicago O'Hare Intl

Sun 26/10

2:20 p.m.-5:17 p.m.

1 stop25h 57m

C$ 356

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Sun 12/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Chicago O'Hare Intl

Sun 19/10

5:30 p.m.-12:40 a.m.

1 stop30h 10m

C$ 379

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Sun 12/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Chicago O'Hare Intl

Sun 19/10

5:30 p.m.-11:59 p.m.

2 stops29h 29m

C$ 411

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Sat 18/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Chicago O'Hare Intl

Sat 25/10

5:30 p.m.-5:17 p.m.

1 stop22h 47m

C$ 425

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Thu 16/10

12:10 p.m.-4:43 p.m.

1 stop29h 33m

Chicago O'Hare Intl

Mon 20/10

9:54 p.m.-4:44 p.m.

2 stops41h 50m

C$ 494

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Tue 28/10

7:55 p.m.-9:33 p.m.

3 stops26h 38m

Chicago O'Hare Intl

Tue 4/11

6:40 a.m.-5:17 p.m.

2 stops33h 37m

C$ 757

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Sat 18/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

C$ 197

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Fri 24/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

C$ 199

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

Showing 1-10 of 17 results
1
2

Best time to book a flight from Hamilton to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Hamilton 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 Hamilton to Illinois

What is the cheapest month to book a flight from Hamilton, Ontario to Illinois?

Currently, January is the cheapest month in which you can book a flight from Hamilton, Ontario to Illinois (average of C$ 261). Flying from Hamilton, Ontario to Illinois in March is currently the most expensive (average of C$ 348). 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 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 15 September 2025.
Read reviews from past customers who have flown Air Canada from Hamilton to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,000 reviews
Check prices

Boarding

7.3

Comfort

7.1

Food

6.3

Crew

7.8

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews
Check prices

Boarding

7.3

Comfort

7.1

Food

6.3

Crew

7.8

Entertainment

6.8

Overall

7.1

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.

Related info for your journey

Find useful and relevant information for your journey from Hamilton 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 Hamilton to Illinois?

    For a flight from Hamilton to Illinois, you will be flying from Hamilton. Hamilton (YHM) is just 10.9 km from the centre of the city.

  • How long is the flight from Hamilton, Ontario to Illinois?

    A quick flight from Hamilton, Ontario to Illinois can take about 11h 43m. WestJet provides one of the quickest options available for as low as C$ 354. The distance between Hamilton, Ontario and Illinois is about 666 km.

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

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

  • How can I find direct flights from Hamilton to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Hamilton 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 Hamilton, Ontario to Illinois?

    Currently, January is the cheapest month in which you can book a flight from Hamilton, Ontario to Illinois (average of C$ 261). Flying from Hamilton, Ontario to Illinois in March is currently the most expensive (average of C$ 348). 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 Hamilton to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to John F Kennedy Intl flights
Pearson Intl to Newark flights
Toronto Island to Newark flights
Pearson Intl to Las Vegas flights
Pearson Intl to Fort Lauderdale flights
Pearson Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to Fort Lauderdale flights
Pierre Elliott Trudeau Intl to LaGuardia flights
Pierre Elliott Trudeau Intl to Newark flights
Pearson Intl to Los Angeles flights
Pearson Intl to Miami flights
Pearson Intl to Dallas/Fort Worth flights
Pearson Intl to O'Hare Intl flights
Pierre Elliott Trudeau Intl to John F Kennedy Intl flights
Pierre Elliott Trudeau Intl to Miami flights
Pearson Intl to Orlando flights
Pearson Intl to San Francisco flights
Pearson Intl to Hobby flights
Pierre Elliott Trudeau Intl to Las Vegas flights
Pearson Intl to Boston flights
Toronto Island to Fort Lauderdale flights
Pearson Intl to George Bush Intcntl flights
Pearson Intl to Atlanta flights
Pearson Intl to Seattle flights
Pierre Elliott Trudeau Intl to O'Hare Intl flights
Pearson Intl to Sky Harbor Intl flights
Pearson Intl to Tampa flights
Pierre Elliott Trudeau Intl to Orlando flights
Pearson Intl to Nashville flights
Pierre Elliott Trudeau Intl to Los Angeles flights
Pearson Intl to West Palm Beach flights
Toronto Island to Orlando flights
Pierre Elliott Trudeau Intl to Dallas/Fort Worth flights
Ottawa to Fort Lauderdale flights
Pearson Intl to Reagan-National flights
Pearson Intl to Dulles Intl flights
Pearson Intl to Midway flights
Toronto Island to Midway flights
Pierre Elliott Trudeau Intl to Dulles Intl flights
Pearson Intl to Fort Myers flights
Pierre Elliott Trudeau Intl to San Francisco flights
Pearson Intl to Honolulu flights
Pearson Intl to Minneapolis flights
Ottawa to Newark flights
Pearson Intl to San Diego flights
Toronto Island to Miami flights
Pierre Elliott Trudeau Intl to Reagan-National flights
Pierre Elliott Trudeau Intl to Nashville flights
Pearson Intl to Austin flights
Toronto Island to Las Vegas flights

Top airline flying from Hamilton to Illinois

Discover the top airline that operate flights from Hamilton 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 629,999 searches. Data last updated 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 305AverageC$ 375FlexibilityNo cancel feeOn-time67%
Search Air Canada 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 Hamilton to Illinois?

Deals for Hamilton to Illinois 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 Hamilton to Illinois?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Illinois from Hamilton.

Can Cheapflights find flights from Hamilton to Illinois with no change fees?

Yes! Cheapflights helps users easily find flights from Hamilton to Illinois with no change fees.

Can Cheapflights notify me if prices for flights from Hamilton to Illinois become cheaper?

Yes! Start tracking prices for Hamilton to Illinois flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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.