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$167+ Cheap flights from Hamilton, ON (YHM) 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
YHM — ORD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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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 July 30, 2025.

Round-trip from

$338
(Kiwi.com)

One-way from

$167
(Jettzy)

Popular in

December

Cheapest in

June

Average price

$270
From Hamilton to Illinois
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One-way flight from Hamilton to Illinois
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Highest demand for flights based on searches. 7% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/196:00 amYHM - ORD
1 stop11h 43mWestJet
Sun 10/262:20 pmORD - YHM
1 stop25h 57mWestJet
Deal found 7/29$338
This Mytrip deal was found by Cheapflights users on 7/30. 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 9/112:55 pmYHM - ORD
2 stops26h 48mMultiple Airlines
Thu 9/185:30 pmORD - YHM
2 stops29h 18mMultiple Airlines
Deal found 7/30$442

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 2,558,603 searches. Data last updated July 30, 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

Sun 10/19

6:00 am-4:43 pm

1 stop11h 43m

Chicago O'Hare Intl

Sun 10/26

2:20 pm-5:17 pm

1 stop25h 57m

$338

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Thu 9/11

2:55 pm-4:43 pm

2 stops26h 48m

Chicago O'Hare Intl

Thu 9/18

5:30 pm-11:48 pm

2 stops29h 18m

$442

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Fri 9/26

6:00 am-4:43 pm

1 stop11h 43m

$167

HamiltonChicago

YHM - ORD

YHMORD

Hamilton

Sat 9/13

2:55 pm-4:43 pm

2 stops26h 48m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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, August is the cheapest month in which you can book a flight from Hamilton, Ontario to Illinois (average of $245). Flying from Hamilton, Ontario 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 YHM to IL?

Find hourly flight availability from Hamilton 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 July 30, 2025.

When flying from Hamilton, Ontario 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.

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 July 30, 2025.
See what other customers who have flown with WestJet from Hamilton to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
WestJet
7.2
Good
2,975 reviews

Boarding

7.4

Comfort

7.0

Crew

7.9

Overall

7.2

Food

6.2

Entertainment

6.1

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight
WestJet
7.2
Good
2,975 reviews
WestJet
7.2
Good
2,975 reviews

Boarding

7.4

Comfort

7.0

Crew

7.9

Overall

7.2

Food

6.2

Entertainment

6.1

Reviews

1 / 20
6.0
Good

Deb,Jan 2025

YYZ - YYC

Boarding went smoothly, you didn't accept debit card for food on flight

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 6.8 mi from the center of the city.

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