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

Delta, Frontier, 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 2,720 per week as of February 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.

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.

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 41m 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 52m.

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

As of February 2026, 388 flights take off from United States and land in Illinois each day. The most common flight departure time for this route is 1:00PM, with 41% 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 February 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.

$50 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.

10:17 pm - 12:53 am

DFW

ORD

2h 36mnonstop

5:09 pm - 8:03 pm

ORD

DFW

2h 54mnonstop

$81Frontier

Mon, Mar 9 - Fri, Mar 13

9:10 am - 11:42 am

DFW

ORD

2h 32mnonstop

6:09 pm - 9:07 pm

ORD

DFW

2h 58mnonstop

$82Frontier

Fri, Apr 17 - Fri, Apr 17

7:18 am - 7:11 pm

DFW

ORD

11h 53m

1 stop

4:28 pm - 7:29 pm

ORD

DFW

3h 01mnonstop

$83Multiple Airlines

Tue, Mar 3 - Wed, Mar 11

7:40 am - 9:22 am

LGA

ORD

2h 42mnonstop

5:58 pm - 8:59 pm

ORD

LGA

2h 01mnonstop

$87Spirit Airlines

Wed, Feb 18 - Wed, Feb 18

12:02 pm - 7:11 pm

EWR

ORD

8h 09m

1 stop

6:51 pm - 10:00 pm

ORD

EWR

2h 09mnonstop

$88Spirit Airlines

Wed, Mar 4 - Mon, Mar 9

6:00 am - 11:49 am

DCA

ORD

6h 49m

1 stop

10:00 am - 4:04 pm

ORD

DCA

5h 04m

1 stop

$176JetBlue

Thu, Mar 5 - Mon, Mar 9

11:55 am - 1:15 pm

DCA

ORD

2h 20mnonstop

6:00 pm - 9:06 pm

ORD

DCA

2h 06mnonstop

$181United Airlines

Thu, Apr 23 - Sat, Apr 25

10:30 am - 2:42 pm

DCA

ORD

5h 12m

1 stop

6:04 am - 9:01 am

ORD

DCA

1h 57mnonstop

$191American Airlines

Thu, Apr 23 - Sat, Apr 25

6:00 pm - 7:22 pm

DCA

ORD

2h 22mnonstop

4:00 pm - 7:05 pm

ORD

DCA

2h 05mnonstop

$197United Airlines

Tue, Apr 28 - Wed, May 6

6:00 am - 12:24 pm

SFO

ORD

4h 24mnonstop

1:46 pm - 4:43 pm

ORD

SFO

4h 57mnonstop

$250American Airlines

Thu, Mar 5 - Tue, Mar 10

JetBlue flights from United States to Illinois

Our best JetBlue deals on United States to Illinois flight tickets

JetBlue

Feb 17

JFK9:25 pmNew York John F Kennedy Intl

3h 01m

ORD11:26 pmChicago O'Hare Intl

Feb 24

ORD6:04 amChicago O'Hare Intl

2h 16m

JFK9:20 amNew York John F Kennedy Intl

$161

JetBlue

Feb 17

JFK9:25 pmNew York John F Kennedy Intl

3h 01m

ORD11:26 pmChicago O'Hare Intl

Feb 23

ORD6:04 amChicago O'Hare Intl

2h 16m

JFK9:20 amNew York John F Kennedy Intl

$162

JetBlue

Feb 17

JFK9:25 pmNew York John F Kennedy Intl

3h 01m

ORD11:26 pmChicago O'Hare Intl

Feb 24

ORD10:00 amChicago O'Hare Intl

8h 00m

1 stop

JFK7:00 pmNew York John F Kennedy Intl

$167

Spirit Airlines flights from United States to Illinois

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

Spirit Airlines

Feb 18

LGA7:40 amNew York LaGuardia

2h 42m

ORD9:22 amChicago O'Hare Intl

Feb 18

ORD5:58 pmChicago O'Hare Intl

2h 01m

LGA8:59 pmNew York LaGuardia

$87

Spirit Airlines

Mar 4

EWR12:02 pmNewark

8h 09m

1 stop

ORD7:11 pmChicago O'Hare Intl

Mar 9

ORD6:51 pmChicago O'Hare Intl

2h 09m

EWR10:00 pmNewark

$88

Spirit Airlines

Feb 14

EWR11:05 pmNewark

2h 35m

ORD12:40 amChicago O'Hare Intl

Feb 17

ORD6:51 pmChicago O'Hare Intl

2h 09m

EWR10:00 pmNewark

$89

Fly from

Fly to

Route

Depart

Return

Price

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Mon 3/9

10:17 pm-12:53 am

Nonstop2h 36m

Chicago O'Hare Intl

Fri 3/13

5:09 pm-8:03 pm

Nonstop2h 54m

$81

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Fri 4/17

9:10 am-11:42 am

Nonstop2h 32m

Chicago O'Hare Intl

Fri 4/17

6:09 pm-9:07 pm

Nonstop2h 58m

$82

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Tue 3/3

7:18 am-7:11 pm

1 stop11h 53m

Chicago O'Hare Intl

Wed 3/11

4:28 pm-7:29 pm

Nonstop3h 01m

$83

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Wed 2/18

7:40 am-9:22 am

Nonstop2h 42m

Chicago O'Hare Intl

Wed 2/18

5:58 pm-8:59 pm

Nonstop2h 01m

$87

NewarkChicago

EWR - ORD

EWRORD

Newark

Wed 3/4

12:02 pm-7:11 pm

1 stop8h 09m

Chicago O'Hare Intl

Mon 3/9

6:51 pm-10:00 pm

Nonstop2h 09m

$88

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 3/5

6:00 am-11:49 am

1 stop6h 49m

Chicago O'Hare Intl

Mon 3/9

10:00 am-4:04 pm

1 stop5h 04m

$176

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 4/23

11:55 am-1:15 pm

Nonstop2h 20m

Chicago O'Hare Intl

Sat 4/25

6:00 pm-9:06 pm

Nonstop2h 06m

$181

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 4/23

10:30 am-2:42 pm

1 stop5h 12m

Chicago O'Hare Intl

Sat 4/25

6:04 am-9:01 am

Nonstop1h 57m

$191

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 4/28

6:00 pm-7:22 pm

Nonstop2h 22m

Chicago O'Hare Intl

Wed 5/6

4:00 pm-7:05 pm

Nonstop2h 05m

$197

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 3/5

6:00 am-12:24 pm

Nonstop4h 24m

Chicago O'Hare Intl

Tue 3/10

1:46 pm-4:43 pm

Nonstop4h 57m

$250

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 February. Flight prices, which tend to average around $186, 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 February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $187.

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 $356. Flights from United States to Illinois on a Sunday will generally be more expensive and average around $431. 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 $274. Flights at noon are often more expensive with an average ticket price of $451.

What is the cheapest United States to Illinois flight route?

Fly from Newark 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 $236 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 $178 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	$37
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 $37. The best round-trip flight deal from United States to Illinois found on momondo in the last 72 hours is $58.

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 February 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 19.62% of the total bookings. Other popular models include Airbus A321neo with 14.01%, Boeing 737-900 with 8.99%, and Embraer 175 with 6.97%.

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 $43	Free Cancellation	Rating 5.7 3,051 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $45	Free Cancellation	Rating 6.3 8,407 reviews	Search Spirit Airlines flights
JetBlue	PriceFrom $68	Free Cancellation	Rating 7.2 2,893 reviews	Search JetBlue flights
Allegiant Air	PriceFrom $68	Free Cancellation	Rating 7.2 709 reviews	Search Allegiant Air flights
Delta	PriceFrom $79	Free Cancellation	Rating 7.9 8,139 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $101	Free Cancellation	Rating 7.8 2,831 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 8.0 4,273 reviews	Search Southwest flights
United Airlines	PriceFrom $117	Free Cancellation	Rating 7.4 9,236 reviews	Search United Airlines flights
Breeze Airways	PriceFrom $121	Free Cancellation	Rating 8.2 263 reviews	Search Breeze Airways flights
American Airlines	PriceFrom $128	Free Cancellation	Rating 7.2 11,217 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.

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 $49

Flights to Los Angelesfrom $46

Flights to Miamifrom $27

Flights to Chicagofrom $49

Flights to Orlandofrom $50

Flights to San Franciscofrom $54

Flights to Las Vegasfrom $49

Flights to Washington, D.C.from $51

Flights to Bostonfrom $51

Flights to Atlantafrom $49

Flights to Dallasfrom $49

Flights to Seattlefrom $83

Cheap flights from the United States to Illinois from $54

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 4/22. 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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Find the cheapest flights from the United States to Illinois

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JetBlue flights from United States to Illinois

Our best JetBlue deals on United States to Illinois flight tickets

Spirit Airlines flights from United States to Illinois

Our best Spirit 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?

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 $274. Flights at noon are often more expensive with an average ticket price of $451.

What is the cheapest United States to Illinois flight route?

Fly from Newark to Chicago Midway for the best United States - Illinois flight prices

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

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.

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

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

What airlines fly to Illinois?

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

As of February 2026, 388 flights take off from United States and land in Illinois each day. The most common flight departure time for this route is 1:00PM, with 41% 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 2,720 per week as of February 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.

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

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

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

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

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

What is the most popular plane model from 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?

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

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

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

I’m not ready to book a flight from United States 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

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

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