How many flights depart from North America to Illinois on average per week?

3,639 flights are operational weekly from North America to Illinois as of December 2025. The most popular departure day for this route is Fri, with 17% of flights per week taking off on this day.

How many flights depart from North America to Illinois on average per day?

As of December 2025, there are 519 flights per day flying from North America to Illinois. The most common time of day flights depart is 6:00AM, with 46% of flights taking off at noon.

What is the cheapest airline that flies from North America to Illinois?

Frontier, United Airlines, and Spirit Airlines are the most popular carriers operating from North America to Illinois

What airlines fly to Illinois?

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Illinois from North America according to our data. American Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 15 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from North America to Illinois?

Prices for flights from North America to Illinois refresh daily.

How many operators does momondo search for flights from North America to Illinois?

There are 11 operators available for flights from North America to Illinois as of December 2025.

How old do you have to be to fly from North America to Illinois?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from North America to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$39 Cheap Flights from North America to Illinois in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from North America to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:20 am - 11:35 am

ATL

ORD

2h 15mnonstop

5:50 am - 9:04 am

ORD

ATL

2h 14mnonstop

$69Frontier

Sat, Jan 10 - Sun, Jan 11

9:22 pm - 10:46 pm

ATL

ORD

2h 24mnonstop

5:05 am - 8:19 am

ORD

ATL

2h 14mnonstop

$70Frontier

Mon, Feb 9 - Fri, Feb 13

9:24 am - 10:49 am

ATL

ORD

2h 25mnonstop

6:00 pm - 9:34 pm

ORD

ATL

2h 34mnonstop

$71Frontier

Fri, Feb 13 - Sun, Feb 15

8:37 pm - 10:07 pm

LGA

ORD

2h 30mnonstop

4:38 pm - 7:42 pm

ORD

LGA

2h 04mnonstop

$83Spirit Airlines

Tue, Jan 6 - Wed, Jan 7

7:30 am - 9:12 am

LGA

ORD

2h 42mnonstop

5:53 pm - 8:59 pm

ORD

LGA

2h 06mnonstop

$84Spirit Airlines

Mon, Jan 19 - Tue, Jan 20

6:15 am - 8:38 am

DFW

ORD

2h 23mnonstop

1:15 pm - 3:55 pm

ORD

DFW

2h 40mnonstop

$91American Airlines

Thu, Jan 15 - Tue, Jan 20

7:00 am - 1:08 pm

SEA

ORD

4h 08mnonstop

8:50 am - 11:32 am

ORD

SEA

4h 42mnonstop

$177United Airlines

Thu, Jan 15 - Sun, Jan 18

8:04 am - 2:15 pm

SEA

ORD

4h 11mnonstop

10:27 am - 1:08 pm

ORD

SEA

4h 41mnonstop

$182American Airlines

Tue, Jan 6 - Tue, Jan 13

12:57 pm - 12:28 am

SEA

ORD

9h 31m1 stop

1:20 pm - 4:01 pm

ORD

SEA

4h 41mnonstop

$183United Airlines

Thu, Jan 15 - Mon, Jan 19

5:30 am - 3:25 pm

SFO

ORD

7h 55m1 stop

7:15 am - 3:30 pm

ORD

SFO

10h 15m2 stops

$273Southwest

Wed, Dec 31 - Tue, Jan 6

Spirit Airlines flights from North America to Illinois

Our best Spirit Airlines deals on North America to Illinois flight tickets

Spirit Airlines

Jan 6

LGA8:37 pmNew York LaGuardia

2h 30m

ORD10:07 pmChicago O'Hare Intl

Jan 8

ORD5:53 pmChicago O'Hare Intl

2h 06m

LGA8:59 pmNew York LaGuardia

$83

Find similar

Spirit Airlines

Jan 19

LGA7:30 amNew York LaGuardia

2h 42m

ORD9:12 amChicago O'Hare Intl

Jan 20

ORD5:53 pmChicago O'Hare Intl

2h 06m

LGA8:59 pmNew York LaGuardia

$84

Find similar

Spirit Airlines

Jan 19

LGA7:30 amNew York LaGuardia

2h 42m

ORD9:12 amChicago O'Hare Intl

Jan 26

ORD5:53 pmChicago O'Hare Intl

2h 06m

LGA8:59 pmNew York LaGuardia

$85

Find similar

Frontier flights from North America to Illinois

Our best Frontier deals on North America to Illinois flight tickets

Frontier

Dec 11

ATL4:09 pmAtlanta Hartsfield-Jackson

2h 18m

ORD5:27 pmChicago O'Hare Intl

Dec 14

ORD6:11 amChicago O'Hare Intl

2h 20m

ATL9:31 amAtlanta Hartsfield-Jackson

$67

Find similar

Frontier

Dec 13

ATL9:10 pmAtlanta Hartsfield-Jackson

2h 14m

ORD10:24 pmChicago O'Hare Intl

Dec 14

ORD6:11 amChicago O'Hare Intl

2h 20m

ATL9:31 amAtlanta Hartsfield-Jackson

$68

Find similar

Frontier

Jan 10

ATL10:20 amAtlanta Hartsfield-Jackson

2h 15m

ORD11:35 amChicago O'Hare Intl

Jan 11

ORD5:50 amChicago O'Hare Intl

2h 14m

ATL9:04 amAtlanta Hartsfield-Jackson

$69

Find similar

Fly from

Fly to

Route

Depart

Return

Price

AtlantaChicago

ATL - ORD

ATLORD

Atlanta Hartsfield-Jackson

Sat 1/10

10:20 am-11:35 am

Nonstop2h 15m

Chicago O'Hare Intl

Sun 1/11

5:50 am-9:04 am

Nonstop2h 14m

$69

AtlantaChicago

ATL - ORD

ATLORD

Atlanta Hartsfield-Jackson

Mon 2/9

9:22 pm-10:46 pm

Nonstop2h 24m

Chicago O'Hare Intl

Fri 2/13

5:05 am-8:19 am

Nonstop2h 14m

$70

AtlantaChicago

ATL - ORD

ATLORD

Atlanta Hartsfield-Jackson

Fri 2/13

9:24 am-10:49 am

Nonstop2h 25m

Chicago O'Hare Intl

Sun 2/15

6:00 pm-9:34 pm

Nonstop2h 34m

$71

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Tue 1/6

8:37 pm-10:07 pm

Nonstop2h 30m

Chicago O'Hare Intl

Wed 1/7

4:38 pm-7:42 pm

Nonstop2h 04m

$83

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Mon 1/19

7:30 am-9:12 am

Nonstop2h 42m

Chicago O'Hare Intl

Tue 1/20

5:53 pm-8:59 pm

Nonstop2h 06m

$84

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Thu 1/15

6:15 am-8:38 am

Nonstop2h 23m

Chicago O'Hare Intl

Tue 1/20

1:15 pm-3:55 pm

Nonstop2h 40m

$91

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 1/15

7:00 am-1:08 pm

Nonstop4h 08m

Chicago O'Hare Intl

Sun 1/18

8:50 am-11:32 am

Nonstop4h 42m

$177

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Tue 1/6

8:04 am-2:15 pm

Nonstop4h 11m

Chicago O'Hare Intl

Tue 1/13

10:27 am-1:08 pm

Nonstop4h 41m

$182

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Thu 1/15

12:57 pm-12:28 am

1 stop9h 31m

Chicago O'Hare Intl

Mon 1/19

1:20 pm-4:01 pm

Nonstop4h 41m

$183

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 12/31

5:30 am-3:25 pm

1 stop7h 55m

Chicago O'Hare Intl

Tue 1/6

7:15 am-3:30 pm

2 stops10h 15m

$273

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from North America to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from North America is in January. Flight prices, which tend to average around $182, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $189.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from North America to Illinois is on a Thursday when prices can be found for as low as $358. Flights from North America to Illinois on a Sunday will generally be more expensive and average around $441. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from North America to Illinois during this time can be as low as $272. Flights at noon are often more expensive with an average ticket price of $454.

What is the cheapest North America to Illinois flight route?

Fly from Atlanta Hartsfield-Jackson to Chicago Midway for the best North America - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from North America when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $241 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from North America for as low as $174 on momondo.

What cabin class options are available on North America to Illinois flights?

There are 4 cabin classes available to choose from on North America to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on North America to Illinois flights?

No. A direct flight is the cheapest option for a flight between North America to Illinois.

Cheap North America to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from North America to Illinois

Best Price Found	$34
Fastest flight time	0h 50m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from North America in the past 72 hours is $34. The best round-trip flight deal from North America to Illinois found on momondo in the last 72 hours is $69.

The fastest flight from North America to Illinois takes 0h 50m

Direct flights go from North America to Illinois every day.

There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)

Search flight deals

When did momondo last update prices for flights from North America to Illinois?
Prices for flights from North America to Illinois refresh daily.
How many operators does momondo search for flights from North America to Illinois?
There are 11 operators available for flights from North America to Illinois as of December 2025.
How old do you have to be to fly from North America to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from North America to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from North America to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from North America to Illinois is Boeing 737-800 (20.80% of total bookings). The next most popular plane models are Airbus A321neo (12.36%), Boeing 737-900 (9.91%), and Boeing 737 MAX 8 (8.83%).

Best airlines flying from North America to Illinois

Compare and see reviews for airlines that fly from North America to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $55	Free Cancellation	Rating 5.8 3,088 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $58	Free Cancellation	Rating 6.3 8,168 reviews	Search Spirit Airlines flights
JetBlue	PriceFrom $78	Free Cancellation	Rating 7.2 2,896 reviews	Search JetBlue flights
Allegiant Air	PriceFrom $91	Free Cancellation	Rating 7.2 698 reviews	Search Allegiant Air flights
Delta	PriceFrom $101	Free Cancellation	Rating 7.9 8,012 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,818 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 8.0 4,252 reviews	Search Southwest flights
United Airlines	PriceFrom $118	Free Cancellation	Rating 7.4 9,076 reviews	Search United Airlines flights
Breeze Airways	PriceFrom $121	Free Cancellation	Rating 8.2 242 reviews	Search Breeze Airways flights
Sun Country Air	PriceFrom $130	Free Cancellation	Rating 6.9 334 reviews	Search Sun Country Air flights

Why use momondo?

Why should I use momondo to find a flight deal from North America to Illinois?

Finding the right flight to Illinois from North America is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

Can I find flights from North America to Illinois with flexible booking policies on momondo?

Flights from North America to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from North America to Illinois?

Once all potential North America to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from North America to Illinois right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from North America and alert you when they change.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Tue 1/6

Tue 1/13

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities in Illinois

Flights to New Yorkfrom $49

Flights to Los Angelesfrom $49

Flights to Miamifrom $48

Flights to Chicagofrom $48

Flights to Orlandofrom $47

Flights to San Franciscofrom $49

Flights to Las Vegasfrom $40

Flights to Washington, D.C.from $47

Flights to Bostonfrom $64

Flights to Atlantafrom $45

Flights to Dallasfrom $53

Flights to Seattlefrom $53

Cheap flights from North America to Illinois from $37

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from North America to Illinois departing on 3/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from North America to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Spirit Airlines flights from North America to Illinois

Our best Spirit Airlines deals on North America to Illinois flight tickets

Frontier flights from North America to Illinois

Our best Frontier deals on North America to Illinois flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from North America to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from North America to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from North America to Illinois during this time can be as low as $272. Flights at noon are often more expensive with an average ticket price of $454.

What is the cheapest North America to Illinois flight route?

Fly from Atlanta Hartsfield-Jackson to Chicago Midway for the best North America - Illinois flight prices

How far in advance should I book a flight to Illinois?

What cabin class options are available on North America to Illinois flights?

There are 4 cabin classes available to choose from on North America to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on North America to Illinois flights?

No. A direct flight is the cheapest option for a flight between North America to Illinois.

What is the cheapest airline that flies from North America to Illinois?

Frontier, United Airlines, and Spirit Airlines are the most popular carriers operating from North America to Illinois

What airlines fly to Illinois?

How many flights depart from North America to Illinois on average per day?

As of December 2025, there are 519 flights per day flying from North America to Illinois. The most common time of day flights depart is 6:00AM, with 46% of flights taking off at noon.

How many flights depart from North America to Illinois on average per week?

3,639 flights are operational weekly from North America to Illinois as of December 2025. The most popular departure day for this route is Fri, with 17% of flights per week taking off on this day.

Cheap North America to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from North America to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from North America to Illinois?

How many operators does momondo search for flights from North America to Illinois?

How old do you have to be to fly from North America to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from North America to Illinois?

Best airlines flying from North America to Illinois

Compare and see reviews for airlines that fly from North America to Illinois with momondo

Why use momondo?

Why should I use momondo to find a flight deal from North America to Illinois?

Can I find flights from North America to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from North America to Illinois?

I’m not ready to book a flight from North America to Illinois right now. Can momondo alert me if prices change?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo