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 48m 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.

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

As of December 2025, 455 flights take off from United States and land in Illinois each day. The most common flight departure time for this route is 6:00AM, with 46% of daily flights taking off at noon.

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 38% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 13 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

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

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

The number of flights available between United States and Illinois is 3,187 per week as of December 2025. The most frequent departure day is Fri, with 17% of weekly flights leaving on this day.

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 December 2025, there are 11 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.

$50 Cheap Flights from the United States 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 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.

1:54 pm - 3:21 pm

BWI

ORD

2h 27mnonstop

8:10 am - 11:10 am

ORD

BWI

2h 00mnonstop

$77Frontier

Mon, Jan 19 - Thu, Jan 22

7:45 pm - 9:12 pm

BWI

ORD

2h 27mnonstop

7:35 am - 10:35 am

ORD

BWI

2h 00mnonstop

$78Frontier

Thu, Jan 15 - Sun, Jan 18

4:54 pm - 11:46 pm

LGA

ORD

7h 52m1 stop

5:15 am - 2:00 pm

ORD

LGA

7h 45m1 stop

$90Spirit Airlines

Wed, Jan 21 - Wed, Jan 28

12:59 pm - 2:41 pm

LGA

ORD

2h 42mnonstop

9:04 am - 12:04 pm

ORD

LGA

2h 00mnonstop

$91Spirit Airlines

Wed, May 6 - Sun, May 10

9:00 am - 10:51 am

JFK

ORD

2h 51mnonstop

4:14 pm - 7:31 pm

ORD

JFK

2h 17mnonstop

$98American Airlines

Fri, Jan 30 - Mon, Feb 2

8:25 pm - 10:29 pm

BOS

ORD

3h 04mnonstop

6:59 pm - 10:31 pm

ORD

BOS

2h 32mnonstop

$137Delta

Fri, Jan 23 - Fri, Jan 30

6:10 am - 8:20 am

BOS

ORD

3h 10mnonstop

8:14 am - 11:33 am

ORD

BOS

2h 19mnonstop

$138American Airlines

Sun, Feb 8 - Sun, Feb 15

12:30 am - 6:30 am

LAX

ORD

4h 00mnonstop

1:00 pm - 3:31 pm

ORD

LAX

4h 31mnonstop

$159United Airlines

Fri, Jan 16 - Tue, Jan 20

5:45 am - 4:38 pm

SFO

ORD

8h 53m1 stop

7:30 am - 2:40 pm

ORD

SFO

9h 10m1 stop

$263Delta

Fri, Jan 30 - Sun, Feb 1

12:25 pm - 6:48 pm

SFO

ORD

4h 23mnonstop

7:58 pm - 11:00 pm

ORD

SFO

5h 02mnonstop

$269United Airlines

Sat, Jan 31 - Mon, Feb 2

United Airlines flights from United States to Illinois

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

United Airlines

Jan 1

BOS6:29 pmBoston Logan Intl

3h 06m

ORD8:35 pmChicago O'Hare Intl

Jan 7

ORD11:05 amChicago O'Hare Intl

2h 25m

BOS2:30 pmBoston Logan Intl

$132

Find similar

United Airlines

Jan 13

EWR4:29 pmNewark

2h 46m

ORD6:15 pmChicago O'Hare Intl

Jan 14

ORD6:05 amChicago O'Hare Intl

2h 10m

EWR9:15 amNewark

$137

Find similar

United Airlines

Jan 17

EWR4:29 pmNewark

2h 46m

ORD6:15 pmChicago O'Hare Intl

Jan 20

ORD7:10 amChicago O'Hare Intl

2h 16m

EWR10:26 amNewark

$139

Find similar

JetBlue flights from United States to Illinois

Our best JetBlue deals on United States to Illinois flight tickets

JetBlue

Jan 16

JFK5:25 pmNew York John F Kennedy Intl

3h 11m

ORD7:36 pmChicago O'Hare Intl

Jan 19

ORD10:15 amChicago O'Hare Intl

2h 17m

JFK1:32 pmNew York John F Kennedy Intl

$96

Find similar

JetBlue

Jan 23

JFK5:25 pmNew York John F Kennedy Intl

3h 11m

ORD7:36 pmChicago O'Hare Intl

Jan 27

ORD9:40 amChicago O'Hare Intl

2h 16m

JFK12:56 pmNew York John F Kennedy Intl

$97

Find similar

JetBlue

Jan 30

JFK5:25 pmNew York John F Kennedy Intl

3h 11m

ORD7:36 pmChicago O'Hare Intl

Feb 2

ORD7:44 amChicago O'Hare Intl

2h 16m

JFK11:00 amNew York John F Kennedy Intl

$127

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Mon 1/19

1:54 pm-3:21 pm

Nonstop2h 27m

Chicago O'Hare Intl

Thu 1/22

8:10 am-11:10 am

Nonstop2h 00m

$77

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Thu 1/15

7:45 pm-9:12 pm

Nonstop2h 27m

Chicago O'Hare Intl

Sun 1/18

7:35 am-10:35 am

Nonstop2h 00m

$78

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Wed 1/21

4:54 pm-11:46 pm

1 stop7h 52m

Chicago O'Hare Intl

Wed 1/28

5:15 am-2:00 pm

1 stop7h 45m

$90

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Wed 5/6

12:59 pm-2:41 pm

Nonstop2h 42m

Chicago O'Hare Intl

Sun 5/10

9:04 am-12:04 pm

Nonstop2h 00m

$91

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Fri 1/30

9:00 am-10:51 am

Nonstop2h 51m

Chicago O'Hare Intl

Mon 2/2

4:14 pm-7:31 pm

Nonstop2h 17m

$98

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Fri 1/23

8:25 pm-10:29 pm

Nonstop3h 04m

Chicago O'Hare Intl

Fri 1/30

6:59 pm-10:31 pm

Nonstop2h 32m

$137

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

Sun 2/8

6:10 am-8:20 am

Nonstop3h 10m

Chicago O'Hare Intl

Sun 2/15

8:14 am-11:33 am

Nonstop2h 19m

$138

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Fri 1/16

12:30 am-6:30 am

Nonstop4h 00m

Chicago O'Hare Intl

Tue 1/20

1:00 pm-3:31 pm

Nonstop4h 31m

$159

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 1/30

5:45 am-4:38 pm

1 stop8h 53m

Chicago O'Hare Intl

Sun 2/1

7:30 am-2:40 pm

1 stop9h 10m

$263

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 1/31

12:25 pm-6:48 pm

Nonstop4h 23m

Chicago O'Hare Intl

Mon 2/2

7:58 pm-11:00 pm

Nonstop5h 02m

$269

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 January. Flight prices, which tend to average around $179, 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 United States to Illinois is on a Thursday when prices can be found for as low as $357. Flights from United States to Illinois on a Sunday will generally be more expensive and average around $434. 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 $272. Flights at noon are often more expensive with an average ticket price of $452.

What is the cheapest United States to Illinois flight route?

Fly from Atlanta Hartsfield-Jackson 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 $242 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 $173 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	$29
Fastest flight time	0h 50m
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 $29. The best round-trip flight deal from United States to Illinois found on momondo in the last 72 hours is $68.

The fastest flight from United States to Illinois takes 0h 50m

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

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 December 2025, there are 11 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 21.59% of the total bookings. Other popular models include Airbus A321neo with 12.84%, Boeing 737-900 with 9.68%, and Boeing 737 MAX 8 with 7.02%.

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 $55	Free Cancellation	Rating 5.8 3,071 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $58	Free Cancellation	Rating 6.3 8,210 reviews	Search Spirit Airlines flights
JetBlue	PriceFrom $75	Free Cancellation	Rating 7.2 2,901 reviews	Search JetBlue flights
Allegiant Air	PriceFrom $91	Free Cancellation	Rating 7.2 703 reviews	Search Allegiant Air flights
Delta	PriceFrom $101	Free Cancellation	Rating 7.9 8,019 reviews	Search Delta flights
Contour	PriceFrom $105	Free Cancellation	Rating 7.6 43 reviews	Search Contour flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,819 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 8.0 4,256 reviews	Search Southwest flights
United Airlines	PriceFrom $118	Free Cancellation	Rating 7.4 9,116 reviews	Search United Airlines flights
Breeze Airways	PriceFrom $121	Free Cancellation	Rating 8.2 250 reviews	Search Breeze Airways 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.