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 Boston (a popular airport in United States) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 2h 44m on average. If you fly from New York (another popular airport in United States) to Chicago O'Hare Intl Airport, then the average flight time is 2h 46m.

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

As of January 2026, 399 flights take off from United States and land in Illinois each day. The most common flight departure time for this route is 10:00AM, with 43% of daily flights taking off at noon.

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

The number of flights available between United States and Illinois is 2,797 per week as of January 2026. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.

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

Spirit Airlines, Delta, and JetBlue are the most popular carriers operating from United States 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 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.

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 January 2026, 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.

$54 Cheap Flights from the United States to Illinois in 2026

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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.

12:05 pm - 1:32 pm

BWI

ORD

2h 27mnonstop

8:10 am - 11:10 am

ORD

BWI

2h 00mnonstop

$69Frontier

Thu, Jan 29 - Thu, Feb 5

9:20 am - 10:47 am

BWI

ORD

2h 27mnonstop

8:45 am - 11:45 am

ORD

BWI

2h 00mnonstop

$72Frontier

Sun, Feb 8 - Mon, Feb 9

12:05 pm - 1:32 pm

BWI

ORD

2h 27mnonstop

5:25 am - 8:25 am

ORD

BWI

2h 00mnonstop

$73Frontier

Thu, Feb 5 - Sun, Feb 8

12:40 pm - 2:07 pm

BWI

ORD

2h 27mnonstop

8:10 am - 11:10 am

ORD

BWI

2h 00mnonstop

$74Frontier

Mon, Jan 26 - Thu, Jan 29

7:19 pm - 8:46 pm

BWI

ORD

2h 27mnonstop

3:15 pm - 6:24 pm

ORD

BWI

2h 09mnonstop

$75Frontier

Thu, Feb 12 - Thu, Feb 19

9:05 pm - 10:42 pm

EWR

ORD

2h 37mnonstop

4:38 pm - 7:46 pm

ORD

EWR

2h 08mnonstop

$85Spirit Airlines

Sat, Feb 7 - Sun, Feb 8

9:05 pm - 10:42 pm

EWR

ORD

2h 37mnonstop

4:38 pm - 7:46 pm

ORD

EWR

2h 08mnonstop

$86Spirit Airlines

Sat, Feb 7 - Sun, Feb 8

6:35 am - 6:40 pm

SFO

ORD

10h 05m

1 stop

4:10 pm - 10:52 pm

ORD

SFO

8h 42m

1 stop

$250Alaska Airlines

Tue, Apr 7 - Wed, Apr 15

10:40 pm - 9:10 am

SFO

ORD

8h 30m

1 stop

1:57 pm - 7:07 pm

ORD

SFO

7h 10m

1 stop

$252Delta

Fri, Mar 13 - Tue, Mar 17

12:25 pm - 6:48 pm

SFO

ORD

4h 23mnonstop

8:20 pm - 11:24 pm

ORD

SFO

5h 04mnonstop

$255United Airlines

Wed, Feb 11 - Wed, Feb 18

Spirit Airlines flights from United States to Illinois

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

Spirit Airlines

Feb 7

EWR9:05 pmNewark

2h 37m

ORD10:42 pmChicago O'Hare Intl

Feb 8

ORD4:38 pmChicago O'Hare Intl

2h 08m

EWR7:46 pmNewark

$85

Spirit Airlines

Feb 7

EWR9:05 pmNewark

2h 37m

ORD10:42 pmChicago O'Hare Intl

Feb 8

ORD4:38 pmChicago O'Hare Intl

2h 08m

EWR7:46 pmNewark

$86

Spirit Airlines

Jan 24

EWR9:05 pmNewark

2h 37m

ORD10:42 pmChicago O'Hare Intl

Jan 26

ORD4:38 pmChicago O'Hare Intl

2h 08m

EWR7:46 pmNewark

$87

Frontier flights from United States to Illinois

Our best Frontier deals on United States to Illinois flight tickets

Frontier

Jan 29

BWI12:05 pmBaltimore/Washington

2h 27m

ORD1:32 pmChicago O'Hare Intl

Feb 5

ORD8:10 amChicago O'Hare Intl

2h 00m

BWI11:10 amBaltimore/Washington

$69

Frontier

Feb 8

BWI9:20 amBaltimore/Washington

2h 27m

ORD10:47 amChicago O'Hare Intl

Feb 9

ORD8:45 amChicago O'Hare Intl

2h 00m

BWI11:45 amBaltimore/Washington

$72

Frontier

Feb 5

BWI12:05 pmBaltimore/Washington

2h 27m

ORD1:32 pmChicago O'Hare Intl

Feb 8

ORD5:25 amChicago O'Hare Intl

2h 00m

BWI8:25 amBaltimore/Washington

$73

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Thu 1/29

12:05 pm-1:32 pm

Nonstop2h 27m

Chicago O'Hare Intl

Thu 2/5

8:10 am-11:10 am

Nonstop2h 00m

$69

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Sun 2/8

9:20 am-10:47 am

Nonstop2h 27m

Chicago O'Hare Intl

Mon 2/9

8:45 am-11:45 am

Nonstop2h 00m

$72

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Thu 2/5

12:05 pm-1:32 pm

Nonstop2h 27m

Chicago O'Hare Intl

Sun 2/8

5:25 am-8:25 am

Nonstop2h 00m

$73

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Mon 1/26

12:40 pm-2:07 pm

Nonstop2h 27m

Chicago O'Hare Intl

Thu 1/29

8:10 am-11:10 am

Nonstop2h 00m

$74

BaltimoreChicago

BWI - ORD

BWIORD

Baltimore/Washington

Thu 2/12

7:19 pm-8:46 pm

Nonstop2h 27m

Chicago O'Hare Intl

Thu 2/19

3:15 pm-6:24 pm

Nonstop2h 09m

$75

NewarkChicago

EWR - ORD

EWRORD

Newark

Sat 2/7

9:05 pm-10:42 pm

Nonstop2h 37m

Chicago O'Hare Intl

Sun 2/8

4:38 pm-7:46 pm

Nonstop2h 08m

$85

NewarkChicago

EWR - ORD

EWRORD

Newark

Sat 2/7

9:05 pm-10:42 pm

Nonstop2h 37m

Chicago O'Hare Intl

Sun 2/8

4:38 pm-7:46 pm

Nonstop2h 08m

$86

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 4/7

6:35 am-6:40 pm

1 stop10h 05m

Chicago O'Hare Intl

Wed 4/15

4:10 pm-10:52 pm

1 stop8h 42m

$250

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 3/13

10:40 pm-9:10 am

1 stop8h 30m

Chicago O'Hare Intl

Tue 3/17

1:57 pm-7:07 pm

1 stop7h 10m

$252

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 2/11

12:25 pm-6:48 pm

Nonstop4h 23m

Chicago O'Hare Intl

Wed 2/18

8:20 pm-11:24 pm

Nonstop5h 04m

$255

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 $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 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 $430. 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 $273. 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 Orlando 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 $237 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 $168 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).

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 January 2026, 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 20.45% of the total bookings. Other popular models include Airbus A321neo with 13.98%, Boeing 737-900 with 9.25%, and Airbus A320neo with 6.67%.

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 5.7 3,056 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $59	Free Cancellation	Rating 6.3 8,309 reviews	Search Spirit Airlines flights
JetBlue	PriceFrom $70	Free Cancellation	Rating 7.2 2,884 reviews	Search JetBlue flights
Allegiant Air	PriceFrom $77	Free Cancellation	Rating 7.2 702 reviews	Search Allegiant Air flights
Delta	PriceFrom $101	Free Cancellation	Rating 7.9 8,040 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,827 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 8.0 4,257 reviews	Search Southwest flights
United Airlines	PriceFrom $118	Free Cancellation	Rating 7.4 9,156 reviews	Search United Airlines flights
Breeze Airways	PriceFrom $121	Free Cancellation	Rating 8.1 258 reviews	Search Breeze Airways flights
American Airlines	PriceFrom $129	Free Cancellation	Rating 7.2 11,119 reviews	Search American 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.