How many flights depart from United States to Illinois on average per week?

The number of flights available between United States and Illinois is 3,849 per week as of June 2026. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

What is the cheapest airline that flies from United States to Illinois?

Delta, United Airlines, and JetBlue are the most popular carriers operating from United States to Illinois

How long is the flight from United States to Illinois?

The flight from United States to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from New York (a popular airport in United States) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 2h 43m on average. If you fly from Boston (another popular airport in United States) to Chicago O'Hare Intl Airport, then the average flight time is 2h 50m.

What airlines fly to Illinois?

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Illinois from United States according to our data. American Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 12 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from United States to Illinois on average per day?

As of June 2026, 549 flights take off from United States and land in Illinois each day. The most common flight departure time for this route is 8:00AM, with 40% of daily flights taking off at noon.

When did momondo last update prices for flights from United States to Illinois?

Prices for flights from United States to Illinois refresh daily.

How many operators does momondo search for flights from United States to Illinois?

As of June 2026, there are 9 operators available to choose from for flights from United States to Illinois.

How old do you have to be to fly from United States to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to Illinois.

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

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$55 Cheap Flights from the United States to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from the United States to Illinois

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from the United States to Illinois

Enter your travel dates to find the best prices.

1:25 pm - 4:08 pm

DFW

ORD

2h 43mnonstop

9:20 am - 12:12 pm

ORD

DFW

2h 52mnonstop

$152Frontier

Tue, Aug 4 - Fri, Aug 7

2:30 pm - 4:51 pm

DFW

MDW

2h 21mnonstop

6:17 pm - 8:54 pm

MDW

DFW

2h 37mnonstop

$152Frontier

Tue, Aug 4 - Fri, Aug 14

4:00 pm - 6:03 pm

LGA

ORD

3h 03mnonstop

8:10 pm - 11:44 pm

ORD

LGA

2h 34mnonstop

$187Delta

Tue, Jul 7 - Tue, Jul 21

1:50 pm - 3:44 pm

JFK

ORD

2h 54mnonstop

4:30 pm - 8:04 pm

ORD

JFK

2h 34mnonstop

$188American Airlines

Sat, Jul 11 - Tue, Jul 14

6:34 am - 8:20 am

LGA

ORD

2h 46mnonstop

6:00 am - 9:17 am

ORD

LGA

2h 17mnonstop

$188American Airlines

Sat, Jul 11 - Tue, Jul 14

9:27 pm - 10:59 pm

LGA

ORD

2h 32mnonstop

6:25 pm - 9:50 pm

ORD

LGA

2h 25mnonstop

$192United Airlines

Fri, Sep 11 - Tue, Sep 15

8:05 am - 9:44 am

LGA

ORD

2h 39mnonstop

7:45 pm - 11:15 pm

ORD

LGA

2h 30mnonstop

$197United Airlines

Tue, Jul 7 - Sat, Jul 11

11:00 am - 6:45 pm

HOU

ORD

7h 45m

1 stop

5:30 am - 1:24 pm

ORD

HOU

7h 54m

1 stop

$199Delta

Tue, Sep 29 - Wed, Sep 30

6:46 pm - 5:00 am

SFO

ORD

8h 14m

1 stop

5:59 pm - 11:08 pm

ORD

SFO

7h 09m

1 stop

$315Alaska Airlines

Mon, Jul 6 - Sat, Jul 18

5:48 pm - 11:59 pm

SEA

ORD

4h 11mnonstop

8:20 pm - 11:04 pm

ORD

SEA

4h 44mnonstop

$355Alaska Airlines

Wed, Jul 1 - Tue, Jul 14

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JetBlue flights from United States to Illinois

Our best JetBlue deals on United States to Illinois flight tickets

JetBlue

Jul 8

JFK7:05 amNew York John F Kennedy Intl

2h 45m

ORD8:50 amChicago O'Hare Intl

Jul 14

ORD6:00 amChicago O'Hare Intl

2h 17m

JFK9:17 amNew York John F Kennedy Intl

$184

JetBlue

Jul 18

JFK7:05 amNew York John F Kennedy Intl

2h 46m

ORD8:51 amChicago O'Hare Intl

Jul 21

ORD6:00 amChicago O'Hare Intl

2h 17m

JFK9:17 amNew York John F Kennedy Intl

$185

JetBlue

Jul 7

JFK7:05 amNew York John F Kennedy Intl

2h 45m

ORD8:50 amChicago O'Hare Intl

Jul 25

ORD5:27 pmChicago O'Hare Intl

2h 33m

JFK9:00 pmNew York John F Kennedy Intl

$187

United Airlines flights from United States to Illinois

Our best United Airlines deals on United States to Illinois flight tickets

United Airlines

Sep 11

LGA9:27 pmNew York LaGuardia

2h 32m

ORD10:59 pmChicago O'Hare Intl

Sep 15

ORD6:25 pmChicago O'Hare Intl

2h 25m

LGA9:50 pmNew York LaGuardia

$192

United Airlines

Jul 7

LGA8:05 amNew York LaGuardia

2h 39m

ORD9:44 amChicago O'Hare Intl

Jul 7

ORD4:00 pmChicago O'Hare Intl

2h 22m

LGA7:22 pmNew York LaGuardia

$197

United Airlines

Aug 4

LGA8:05 amNew York LaGuardia

2h 39m

ORD9:44 amChicago O'Hare Intl

Aug 10

ORD6:29 pmChicago O'Hare Intl

2h 29m

LGA9:58 pmNew York LaGuardia

$200

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Tue 8/4

1:25 pm-4:08 pm

Nonstop2h 43m

Chicago O'Hare Intl

Fri 8/7

9:20 am-12:12 pm

Nonstop2h 52m

$152

DallasChicago

DFW - MDW

DFWMDW

Dallas/Fort Worth

Tue 8/4

2:30 pm-4:51 pm

Nonstop2h 21m

Chicago Midway

Fri 8/14

6:17 pm-8:54 pm

Nonstop2h 37m

$152

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Tue 7/7

4:00 pm-6:03 pm

Nonstop3h 03m

Chicago O'Hare Intl

Tue 7/21

8:10 pm-11:44 pm

Nonstop2h 34m

$187

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Sat 7/11

1:50 pm-3:44 pm

Nonstop2h 54m

Chicago O'Hare Intl

Tue 7/14

4:30 pm-8:04 pm

Nonstop2h 34m

$188

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Sat 7/11

6:34 am-8:20 am

Nonstop2h 46m

Chicago O'Hare Intl

Tue 7/14

6:00 am-9:17 am

Nonstop2h 17m

$188

Quickest round-trip

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Fri 9/11

9:27 pm-10:59 pm

Nonstop2h 32m

Chicago O'Hare Intl

Tue 9/15

6:25 pm-9:50 pm

Nonstop2h 25m

$192

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Tue 7/7

8:05 am-9:44 am

Nonstop2h 39m

Chicago O'Hare Intl

Sat 7/11

7:45 pm-11:15 pm

Nonstop2h 30m

$197

HoustonChicago

HOU - ORD

HOUORD

Houston Hobby

Tue 9/29

11:00 am-6:45 pm

1 stop7h 45m

Chicago O'Hare Intl

Wed 9/30

5:30 am-1:24 pm

1 stop7h 54m

$199

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 7/6

6:46 pm-5:00 am

1 stop8h 14m

Chicago O'Hare Intl

Sat 7/18

5:59 pm-11:08 pm

1 stop7h 09m

$315

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 7/1

5:48 pm-11:59 pm

Nonstop4h 11m

Chicago O'Hare Intl

Tue 7/14

8:20 pm-11:04 pm

Nonstop4h 44m

$355

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 United States 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 United States is in September. Flight prices, which tend to average around $256, 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 September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $259.

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

The cheapest day to depart from United States to Illinois is on a Wednesday when prices can be found for as low as $401. Flights from United States to Illinois on a Sunday will generally be more expensive and average around $486. 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 United States to Illinois during this time can be as low as $326. Flights at noon are often more expensive with an average ticket price of $498.

What is the cheapest United States to Illinois flight route?

Fly from Dallas/Fort Worth to Chicago Midway for the best United States - 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 United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $244 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from United States for as low as $174 on momondo.

What cabin class options are available on United States to Illinois flights?

There are 4 cabin classes available to choose from on United States 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 United States to Illinois flights?

No. A direct flight is the cheapest option for a flight between United States to Illinois.

Cheap United States to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Illinois

Best Price Found	$39
Fastest flight time	0h 45m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from United States in the past 72 hours is $39. The best round-trip flight deal from United States to Illinois found on momondo in the last 72 hours is $78.

The fastest flight from United States to Illinois takes 0h 45m

Direct flights go from United States to Illinois every day.

There are 98 airports in Illinois. From United States there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).

Search flight deals

Frequently asked questions about flying from the United States to Illinois

When did momondo last update prices for flights from United States to Illinois?
Prices for flights from United States to Illinois refresh daily.
How many operators does momondo search for flights from United States to Illinois?
As of June 2026, there are 9 operators available to choose from for flights from United States to Illinois.
How old do you have to be to fly from United States to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from United States to Illinois?
Based on momondo bookings for flights between United States and Illinois, the leading plane model is Boeing 737-800, making up 23.64% of the total bookings. Other popular models include Airbus A321neo with 13.78%, Boeing 737-900 with 11.05%, and Boeing 737 MAX 8 with 8.16%.

Best airlines flying from United States to Illinois

Compare and see reviews for airlines that fly from United States to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $39	Free Cancellation	Rating 5.6 2,883 reviews	Search Frontier flights
JetBlue	PriceFrom $68	Free Cancellation	Rating 7.1 2,981 reviews	Search JetBlue flights
Delta	PriceFrom $74	Free Cancellation	Rating 7.9 8,403 reviews	Search Delta flights
Contour	PriceFrom $105	Free Cancellation	Rating 7.7 42 reviews	Search Contour flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,829 reviews	Search Hawaiian Airlines flights
Allegiant Air	PriceFrom $110	Free Cancellation	Rating 7.3 694 reviews	Search Allegiant Air flights
United Airlines	PriceFrom $124	Free Cancellation	Rating 7.4 9,844 reviews	Search United Airlines flights
Southwest	PriceFrom $130	Free Cancellation	Rating 7.9 4,237 reviews	Search Southwest flights
American Airlines	PriceFrom $137	Free Cancellation	Rating 7.1 11,669 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $177	Free Cancellation	Rating 7.9 12,524 reviews	Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from United States to Illinois?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from United States.

Can I find flights from United States to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for United States to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from United States to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from United States. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Illinois from United States are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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.

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Popular cities in Illinois

Flights to New Yorkfrom $83

Flights to Los Angelesfrom $56

Flights to Orlandofrom $65

Flights to Miamifrom $50

Flights to Chicagofrom $58

Flights to San Franciscofrom $56

Flights to Las Vegasfrom $51

Flights to Washington, D.C.from $56

Flights to Bostonfrom $62

Flights to Atlantafrom $50

Flights to Fort Lauderdalefrom $55

Flights to Dallasfrom $87

Cheap flights from the United States to Illinois from $74

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Illinois departing on 8/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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JetBlue flights from United States to Illinois

Our best JetBlue deals on United States to Illinois flight tickets

United Airlines flights from United States to Illinois

Our best United Airlines deals on United States to Illinois flight tickets

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How to get the cheapest flight ticket from United States to Illinois

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?

What is the cheapest United States to Illinois flight route?

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

What cabin class options are available on United States to Illinois flights?

Can stopping save me money on United States to Illinois flights?

What is the cheapest airline that flies from United States to Illinois?

What airlines fly to Illinois?

How many flights depart from United States to Illinois on average per day?

How many flights depart from United States to Illinois on average per week?

How long is the flight from United States to Illinois?

Cheap United States to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from the United States to Illinois

Best airlines flying from United States to Illinois

Compare and see reviews for airlines that fly from United States to Illinois with momondo

Why use momondo?

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

United States flight routes

According to popular flight searches on momondo this year

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