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

The number of flights available between United States and Illinois is 2,685 per week as of September 2026. The most frequent departure day is Fri, with 22% of weekly flights leaving on this day.

What airlines fly to Illinois?

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Illinois from United States according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 11 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 September 2026, 383 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 39% of daily flights taking off at noon.

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

JetBlue, United Airlines, and Frontier 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 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 48m 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 48m.

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 September 2026, there are 8 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.

$93 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.

2:42 pm - 4:10 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 28mnonstop

10:53 am - 2:00 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 07mnonstop

$178Frontier

Wed, Nov 25 - Thu, Dec 3

2:42 pm - 4:10 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 28mnonstop

10:53 am - 2:00 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 07mnonstop

$178Frontier

Sun, Nov 22 - Thu, Dec 3

5:27 pm - 11:00 pmDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

6h 33m1 stop Charlotte Douglas

3:16 pm - 9:44 pmORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

5h 28m1 stop Columbus

$180American Airlines

Wed, Oct 28 - Thu, Oct 29

5:00 pm - 7:01 pmBOS Boston Logan Intl-ORD Chicago O'Hare Intl

3h 01mnonstop

8:24 pm - 12:09 amORD Chicago O'Hare Intl-BOS Boston Logan Intl

2h 45mnonstop

$198JetBlue

Thu, Sep 24 - Mon, Sep 28

5:00 pm - 7:01 pmBOS Boston Logan Intl-ORD Chicago O'Hare Intl

3h 01mnonstop

8:24 pm - 12:09 amORD Chicago O'Hare Intl-BOS Boston Logan Intl

2h 45mnonstop

$199JetBlue

Thu, Sep 24 - Mon, Sep 28

6:10 am - 7:29 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 19mnonstop

11:00 am - 2:06 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 06mnonstop

$206United Airlines

Sat, Oct 31 - Sat, Oct 31

12:12 pm - 2:18 pmBOS Boston Logan Intl-ORD Chicago O'Hare Intl

3h 06mnonstop

5:17 pm - 8:51 pmORD Chicago O'Hare Intl-BOS Boston Logan Intl

2h 34mnonstop

$213American Airlines

Thu, Nov 5 - Thu, Nov 5

2:03 pm - 12:21 amLAX Los Angeles-ORD Chicago O'Hare Intl

8h 18m1 stop Denver Intl

7:00 am - 1:47 pmORD Chicago O'Hare Intl-LAX Los Angeles

8h 47m1 stop Seattle/Tacoma Intl

$213Multiple Airlines

Tue, Nov 3 - Wed, Nov 11

12:21 am - 6:34 amLAX Los Angeles-ORD Chicago O'Hare Intl

4h 13mnonstop

9:00 am - 5:59 pmORD Chicago O'Hare Intl-LAX Los Angeles

10h 59m1 stop Seattle/Tacoma Intl

$214Multiple Airlines

Wed, Oct 14 - Thu, Oct 22

7:46 am - 9:00 amDCA Washington, D.C. Reagan-National-ORD Chicago O'Hare Intl

2h 14mnonstop

6:00 am - 11:59 amORD Chicago O'Hare Intl-DCA Washington, D.C. Reagan-National

4h 59m1 stop Newark

$215United Airlines

Mon, Oct 19 - Sat, Oct 24

Recent last minute flight deals from the United States to Illinois

Enter your travel dates to find the best prices.

10:20 am - 11:40 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 20mnonstop

6:20 am - 9:25 amORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 05mnonstop

$187Frontier

Thu, Sep 10 - Mon, Oct 5

1:17 pm - 4:00 pmDFW Dallas/Fort Worth-ORD Chicago O'Hare Intl

2h 43mnonstop

1:01 pm - 3:47 pmORD Chicago O'Hare Intl-DFW Dallas/Fort Worth

2h 46mnonstop

$194Frontier

Sun, Sep 6 - Fri, Sep 11

5:31 pm - 8:15 pmDFW Dallas/Fort Worth-ORD Chicago O'Hare Intl

2h 44mnonstop

2:40 pm - 7:15 pmORD Chicago O'Hare Intl-DFW Dallas/Fort Worth

4h 35m1 stop Kirksville Cannon Memorial

$238Multiple Airlines

Sun, Sep 6 - Fri, Sep 11

9:15 am - 11:52 amDFW Dallas/Fort Worth-ORD Chicago O'Hare Intl

2h 37mnonstop

2:40 pm - 7:15 pmORD Chicago O'Hare Intl-DFW Dallas/Fort Worth

4h 35m1 stop Kirksville Cannon Memorial

$238Multiple Airlines

Wed, Sep 9 - Thu, Sep 10

1:25 pm - 7:25 pmJFK New York John F Kennedy Intl-ORD Chicago O'Hare Intl

7h 00m1 stop Boston Logan Intl

10:59 am - 2:20 pmORD Chicago O'Hare Intl-JFK New York John F Kennedy Intl

2h 21mnonstop

$252JetBlue

Sun, Sep 6 - Wed, Sep 9

10:44 am - 5:05 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 21mnonstop

6:00 am - 8:27 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 27mnonstop

$271United Airlines

Wed, Sep 9 - Tue, Oct 13

5:25 pm - 11:31 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 06mnonstop

2:45 pm - 5:16 pmORD Chicago O'Hare Intl-LAX Los Angeles

4h 31mnonstop

$271Delta

Wed, Sep 9 - Wed, Oct 14

7:20 am - 9:00 amLGA New York LaGuardia-ORD Chicago O'Hare Intl

2h 40mnonstop

6:00 am - 9:13 amORD Chicago O'Hare Intl-LGA New York LaGuardia

2h 13mnonstop

$277United Airlines

Thu, Sep 10 - Sun, Sep 13

8:10 am - 9:58 amJFK New York John F Kennedy Intl-ORD Chicago O'Hare Intl

2h 48mnonstop

7:00 am - 10:27 amORD Chicago O'Hare Intl-JFK New York John F Kennedy Intl

2h 27mnonstop

$277JetBlue

Thu, Sep 10 - Mon, Sep 28

7:35 pm - 9:52 pmJFK New York John F Kennedy Intl-ORD Chicago O'Hare Intl

3h 17mnonstop

6:10 am - 9:27 amORD Chicago O'Hare Intl-JFK New York John F Kennedy Intl

2h 17mnonstop

$286Delta

Sun, Sep 6 - Wed, Oct 7

Recent direct flight deals from the United States to Illinois

Enter your travel dates to find the best prices.

2:42 pm - 4:10 pmBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 28mnonstop

10:53 am - 2:00 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 07mnonstop

$178Frontier

Sun, Nov 22 - Thu, Dec 3

9:58 am - 11:21 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 23mnonstop

6:00 am - 9:03 amORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 03mnonstop

$178Frontier

Thu, Oct 15 - Sun, Oct 18

5:00 pm - 7:01 pmBOS Boston Logan Intl-ORD Chicago O'Hare Intl

3h 01mnonstop

8:24 pm - 12:09 amORD Chicago O'Hare Intl-BOS Boston Logan Intl

2h 45mnonstop

$198JetBlue

Thu, Sep 24 - Mon, Sep 28

5:00 pm - 7:01 pmBOS Boston Logan Intl-ORD Chicago O'Hare Intl

3h 01mnonstop

8:24 pm - 12:09 amORD Chicago O'Hare Intl-BOS Boston Logan Intl

2h 45mnonstop

$199JetBlue

Thu, Sep 24 - Mon, Sep 28

6:10 am - 7:29 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 19mnonstop

11:00 am - 2:06 pmORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 06mnonstop

$206United Airlines

Sat, Oct 31 - Sat, Oct 31

12:12 pm - 2:18 pmBOS Boston Logan Intl-ORD Chicago O'Hare Intl

3h 06mnonstop

5:17 pm - 8:51 pmORD Chicago O'Hare Intl-BOS Boston Logan Intl

2h 34mnonstop

$213American Airlines

Thu, Nov 5 - Thu, Nov 5

1:41 pm - 8:04 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 23mnonstop

8:42 am - 11:26 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 44mnonstop

$216American Airlines

Mon, Nov 2 - Thu, Nov 5

6:05 am - 7:26 amBWI Baltimore/Washington-ORD Chicago O'Hare Intl

2h 21mnonstop

7:30 am - 10:30 amORD Chicago O'Hare Intl-BWI Baltimore/Washington

2h 00mnonstop

$217United Airlines

Wed, Sep 16 - Fri, Sep 18

8:50 pm - 10:32 pmBOS Boston Logan Intl-ORD Chicago O'Hare Intl

2h 42mnonstop

7:35 am - 11:08 amORD Chicago O'Hare Intl-BOS Boston Logan Intl

2h 33mnonstop

$217Delta

Thu, Sep 24 - Mon, Sep 28

1:35 pm - 3:27 pmBOS Boston Logan Intl-ORD Chicago O'Hare Intl

2h 52mnonstop

7:25 am - 11:00 amORD Chicago O'Hare Intl-BOS Boston Logan Intl

2h 35mnonstop

$217Delta

Sat, Oct 17 - Wed, Oct 21

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

Delta flights from United States to Illinois

Our best Delta deals on United States to Illinois flight tickets

Delta

Sep 24

BOS8:50 pmBoston Logan Intl

2h 42m

ORD10:32 pmChicago O'Hare Intl

Sep 28

ORD7:35 amChicago O'Hare Intl

2h 33m

BOS11:08 amBoston Logan Intl

$217

Delta

Sep 24

BOS8:50 pmBoston Logan Intl

2h 42m

ORD10:32 pmChicago O'Hare Intl

Sep 28

ORD7:35 amChicago O'Hare Intl

2h 33m

BOS11:08 amBoston Logan Intl

$218

Delta

Oct 16

BOS7:40 pmBoston Logan Intl

2h 51m

ORD9:31 pmChicago O'Hare Intl

Oct 20

ORD7:25 amChicago O'Hare Intl

2h 35m

BOS11:00 amBoston Logan Intl

$226

Frontier flights from United States to Illinois

Our best Frontier deals on United States to Illinois flight tickets

Frontier

Oct 15

BWI9:58 amBaltimore/Washington

2h 23m

ORD11:21 amChicago O'Hare Intl

Oct 18

ORD6:00 amChicago O'Hare Intl

2h 03m

BWI9:03 amBaltimore/Washington

$178

Frontier

Oct 8

BWI9:58 amBaltimore/Washington

2h 23m

ORD11:21 amChicago O'Hare Intl

Oct 11

ORD6:00 amChicago O'Hare Intl

2h 03m

BWI9:03 amBaltimore/Washington

$179

Frontier

Nov 5

BWI9:53 amBaltimore/Washington

2h 30m

ORD11:23 amChicago O'Hare Intl

Nov 6

ORD10:26 amChicago O'Hare Intl

5h 18m

1 stop

BWI4:44 pmBaltimore/Washington

$180

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

Cheapest round-trip

BaltimoreChicago

BWI Baltimore/Washington - ORD Chicago O'Hare Intl

BWIORD

Baltimore/Washington

Wed 11/25

2:42 pm-4:10 pm

Nonstop2h 28m

Chicago O'Hare Intl

Thu 12/3

10:53 am-2:00 pm

Nonstop2h 07m

$178

BaltimoreChicago

BWI Baltimore/Washington - ORD Chicago O'Hare Intl

BWIORD

Baltimore/Washington

Sun 11/22

2:42 pm-4:10 pm

Nonstop2h 28m

Chicago O'Hare Intl

Thu 12/3

10:53 am-2:00 pm

Nonstop2h 07m

$178

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Wed 10/28

5:27 pm-11:00 pm

1 stop6h 33m

Chicago O'Hare Intl

Thu 10/29

3:16 pm-9:44 pm

1 stop5h 28m

$180

BostonChicago

BOS Boston Logan Intl - ORD Chicago O'Hare Intl

BOSORD

Boston Logan Intl

Thu 9/24

5:00 pm-7:01 pm

Nonstop3h 01m

Chicago O'Hare Intl

Mon 9/28

8:24 pm-12:09 am

Nonstop2h 45m

$198

BostonChicago

BOS Boston Logan Intl - ORD Chicago O'Hare Intl

BOSORD

Boston Logan Intl

Thu 9/24

5:00 pm-7:01 pm

Nonstop3h 01m

Chicago O'Hare Intl

Mon 9/28

8:24 pm-12:09 am

Nonstop2h 45m

$199

Quickest round-trip

BaltimoreChicago

BWI Baltimore/Washington - ORD Chicago O'Hare Intl

BWIORD

Baltimore/Washington

Sat 10/31

6:10 am-7:29 am

Nonstop2h 19m

Chicago O'Hare Intl

Sat 10/31

11:00 am-2:06 pm

Nonstop2h 06m

$206

BostonChicago

BOS Boston Logan Intl - ORD Chicago O'Hare Intl

BOSORD

Boston Logan Intl

Thu 11/5

12:12 pm-2:18 pm

Nonstop3h 06m

Chicago O'Hare Intl

Thu 11/5

5:17 pm-8:51 pm

Nonstop2h 34m

$213

Los AngelesChicago

LAX Los Angeles - ORD Chicago O'Hare Intl

LAXORD

Los Angeles

Tue 11/3

2:03 pm-12:21 am

1 stop8h 18m

Chicago O'Hare Intl

Wed 11/11

7:00 am-1:47 pm

1 stop8h 47m

$213

Los AngelesChicago

LAX Los Angeles - ORD Chicago O'Hare Intl

LAXORD

Los Angeles

Wed 10/14

12:21 am-6:34 am

Nonstop4h 13m

Chicago O'Hare Intl

Thu 10/22

9:00 am-5:59 pm

1 stop10h 59m

$214

Washington, D.C.Chicago

DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl

DCAORD

Washington, D.C. Reagan-National

Mon 10/19

7:46 am-9:00 am

Nonstop2h 14m

Chicago O'Hare Intl

Sat 10/24

6:00 am-11:59 am

1 stop4h 59m

$215

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 $260, 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 $272.

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 $403. Flights from United States to Illinois on a Sunday will generally be more expensive and average around $503. 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 $366. Flights at noon are often more expensive with an average ticket price of $515.

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 $177 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	$93
Fastest flight time	0h 50m
Direct flights	Mon, Tue, Wed, Fri, Sat and Sun
Airports in Illinois	98 airports

The best one-way flight to Illinois from United States in the past 72 hours is $93. The best round-trip flight deal from United States to Illinois found on momondo in the last 72 hours is $178.

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

Direct flights go from United States to Illinois on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. Airlines offering direct flights are: Avelo Airlines, Southwest and Delta.

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

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 September 2026, there are 8 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 21.14% of the total bookings. Other popular models include Airbus A321neo with 14.16%, Boeing 737-900 with 10.58%, and Boeing 737 MAX 9 with 7.57%.

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 $44	Free Cancellation	Rating 5.6 2,624 reviews	Search Frontier flights
JetBlue	PriceFrom $72	Free Cancellation	Rating 7.1 3,046 reviews	Search JetBlue flights
Delta	PriceFrom $74	Free Cancellation	Rating 7.8 8,570 reviews	Search Delta flights
Contour	PriceFrom $105	Free Cancellation	Rating 7.5 43 reviews	Search Contour flights
Allegiant Air	PriceFrom $110	Free Cancellation	Rating 7.3 676 reviews	Search Allegiant Air flights
Breeze Airways	PriceFrom $128	Free Cancellation	Rating 8.2 320 reviews	Search Breeze Airways flights
United Airlines	PriceFrom $130	Free Cancellation	Rating 7.4 10,174 reviews	Search United Airlines flights
Southwest	PriceFrom $137	Free Cancellation	Rating 8.0 4,203 reviews	Search Southwest flights
American Airlines	PriceFrom $140	Free Cancellation	Rating 7.1 12,050 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $204	Free Cancellation	Rating 7.9 12,879 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Mon 10/5

Mon 10/12

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

Other flights from the United States

Other flights to Illinois

Airlines

Complete your trip

Feeling lucky

Popular cities in Illinois

Flights to New Yorkfrom $69

Flights to Los Angelesfrom $50

Flights to Orlandofrom $50

Flights to Miamifrom $79

Flights to San Franciscofrom $40

Flights to Chicagofrom $50

Flights to Las Vegasfrom $49

Flights to Washington, D.C.from $50

Flights to Bostonfrom $82

Flights to Fort Lauderdalefrom $60

Flights to Atlantafrom $38

Flights to Dallasfrom $62

Cheap flights from the United States to Illinois from $93

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 9/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from the United States to Illinois

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

Recent one-way flight deals from the United States to Illinois

Recent last minute flight deals from the United States to Illinois

Recent direct flight deals from the United States to Illinois

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

Delta flights from United States to Illinois

Our best Delta deals on United States to Illinois flight tickets

Frontier flights from United States to Illinois

Our best Frontier deals on United States to Illinois flight tickets

momondo Fare Finder

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

See travel insights to Illinois from

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

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

Illinois flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Illinois

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Illinois

Explore popular destinations other users love

According to popular flight searches on momondo this year