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

Delta, JetBlue, 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 2,589 per week as of July 2026. The most frequent departure day is Wed, with 23% of weekly flights leaving on this day.

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

As of July 2026, 369 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 41% of daily flights taking off at noon.

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 48m.

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 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.

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 July 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.

$67 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.

1:17 pm - 4:00 pm

DFW

ORD

2h 43mnonstop

6:05 am - 8:44 am

ORD

DFW

2h 39mnonstop

$186Frontier

Sat, Aug 22 - Thu, Sep 24

1:25 pm - 4:08 pm

DFW

ORD

2h 43mnonstop

9:20 am - 12:12 pm

ORD

DFW

2h 52mnonstop

$188Frontier

Tue, Jul 28 - Wed, Aug 12

7:29 pm - 9:30 pm

LGA

ORD

3h 01mnonstop

8:25 pm - 11:45 pm

ORD

LGA

2h 20mnonstop

$191American Airlines

Fri, Sep 4 - Tue, Sep 8

8:00 pm - 9:58 pm

JFK

ORD

2h 58mnonstop

6:00 am - 9:17 am

ORD

JFK

2h 17mnonstop

$191JetBlue

Sun, Aug 16 - Wed, Aug 19

7:35 am - 9:27 am

JFK

ORD

2h 52mnonstop

6:00 am - 9:20 am

ORD

JFK

2h 20mnonstop

$192Delta

Tue, Sep 15 - Tue, Nov 24

5:55 pm - 7:59 pm

LGA

ORD

3h 04mnonstop

7:00 am - 10:14 am

ORD

LGA

2h 14mnonstop

$194Delta

Sat, Jul 18 - Wed, Jul 29

8:00 pm - 9:58 pm

JFK

ORD

2h 58mnonstop

6:30 pm - 10:06 pm

ORD

JFK

2h 36mnonstop

$194JetBlue

Wed, Jul 15 - Wed, Jul 29

6:05 am - 9:36 am

LGA

ORD

4h 31m

1 stop

2:00 pm - 5:22 pm

ORD

LGA

2h 22mnonstop

$195United Airlines

Wed, Jul 22 - Wed, Jul 22

7:20 am - 9:00 am

LGA

ORD

2h 40mnonstop

6:00 am - 9:13 am

ORD

LGA

2h 13mnonstop

$197United Airlines

Thu, Sep 10 - Sun, Sep 13

5:19 pm - 7:20 pm

EWR

ORD

3h 01mnonstop

8:36 pm - 11:59 pm

ORD

EWR

2h 23mnonstop

$208American Airlines

Fri, Aug 14 - Fri, Aug 21

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United Airlines flights from United States to Illinois

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

United Airlines

Jul 15

LGA3:25 pmNew York LaGuardia

2h 55m

ORD5:20 pmChicago O'Hare Intl

Jul 22

ORD6:00 amChicago O'Hare Intl

2h 11m

LGA9:11 amNew York LaGuardia

$194

United Airlines

Jul 22

LGA6:05 amNew York LaGuardia

4h 31m

1 stop

ORD9:36 amChicago O'Hare Intl

Jul 22

ORD2:00 pmChicago O'Hare Intl

2h 22m

LGA5:22 pmNew York LaGuardia

$195

United Airlines

Sep 10

LGA7:20 amNew York LaGuardia

2h 40m

ORD9:00 amChicago O'Hare Intl

Sep 13

ORD6:00 amChicago O'Hare Intl

2h 13m

LGA9:13 amNew York LaGuardia

$197

Frontier flights from United States to Illinois

Our best Frontier deals on United States to Illinois flight tickets

Frontier

Aug 22

DFW1:17 pmDallas/Fort Worth

2h 43m

ORD4:00 pmChicago O'Hare Intl

Sep 24

ORD6:05 amChicago O'Hare Intl

2h 39m

DFW8:44 amDallas/Fort Worth

$186

Frontier

Jul 28

DFW1:25 pmDallas/Fort Worth

2h 43m

ORD4:08 pmChicago O'Hare Intl

Aug 12

ORD9:20 amChicago O'Hare Intl

2h 52m

DFW12:12 pmDallas/Fort Worth

$188

Frontier

Aug 15

DFW1:17 pmDallas/Fort Worth

2h 43m

ORD4:00 pmChicago O'Hare Intl

Aug 17

ORD9:20 amChicago O'Hare Intl

2h 52m

DFW12:12 pmDallas/Fort Worth

$189

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Sat 8/22

1:17 pm-4:00 pm

Nonstop2h 43m

Chicago O'Hare Intl

Thu 9/24

6:05 am-8:44 am

Nonstop2h 39m

$186

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Tue 7/28

1:25 pm-4:08 pm

Nonstop2h 43m

Chicago O'Hare Intl

Wed 8/12

9:20 am-12:12 pm

Nonstop2h 52m

$188

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Fri 9/4

7:29 pm-9:30 pm

Nonstop3h 01m

Chicago O'Hare Intl

Tue 9/8

8:25 pm-11:45 pm

Nonstop2h 20m

$191

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Sun 8/16

8:00 pm-9:58 pm

Nonstop2h 58m

Chicago O'Hare Intl

Wed 8/19

6:00 am-9:17 am

Nonstop2h 17m

$191

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Tue 9/15

7:35 am-9:27 am

Nonstop2h 52m

Chicago O'Hare Intl

Tue 11/24

6:00 am-9:20 am

Nonstop2h 20m

$192

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Sat 7/18

5:55 pm-7:59 pm

Nonstop3h 04m

Chicago O'Hare Intl

Wed 7/29

7:00 am-10:14 am

Nonstop2h 14m

$194

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Wed 7/15

8:00 pm-9:58 pm

Nonstop2h 58m

Chicago O'Hare Intl

Wed 7/29

6:30 pm-10:06 pm

Nonstop2h 36m

$194

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Wed 7/22

6:05 am-9:36 am

1 stop4h 31m

Chicago O'Hare Intl

Wed 7/22

2:00 pm-5:22 pm

Nonstop2h 22m

$195

Quickest round-trip

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Thu 9/10

7:20 am-9:00 am

Nonstop2h 40m

Chicago O'Hare Intl

Sun 9/13

6:00 am-9:13 am

Nonstop2h 13m

$197

NewarkChicago

EWR - ORD

EWRORD

Newark

Fri 8/14

5:19 pm-7:20 pm

Nonstop3h 01m

Chicago O'Hare Intl

Fri 8/21

8:36 pm-11:59 pm

Nonstop2h 23m

$208

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 $258, 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 September is also cheap. Prices for this month can be found on momondo for an average of $260.

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 $490. 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 $336. Flights at noon are often more expensive with an average ticket price of $499.

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 $243 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 $74.

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).

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 July 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 23.74% of the total bookings. Other popular models include Airbus A321neo with 13.80%, Boeing 737-900 with 11.19%, and Boeing 737 MAX 8 with 7.95%.

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 2,849 reviews	Search Frontier flights
JetBlue	PriceFrom $68	Free Cancellation	Rating 7.1 3,010 reviews	Search JetBlue flights
Delta	PriceFrom $74	Free Cancellation	Rating 7.8 8,452 reviews	Search Delta flights
Contour	PriceFrom $105	Free Cancellation	Rating 7.7 42 reviews	Search Contour flights
Allegiant Air	PriceFrom $110	Free Cancellation	Rating 7.3 689 reviews	Search Allegiant Air flights
Hawaiian Airlines	PriceFrom $124	Free Cancellation	Rating 7.8 2,825 reviews	Search Hawaiian Airlines flights
United Airlines	PriceFrom $124	Free Cancellation	Rating 7.4 9,909 reviews	Search United Airlines flights
Southwest	PriceFrom $134	Free Cancellation	Rating 7.9 4,246 reviews	Search Southwest flights
American Airlines	PriceFrom $137	Free Cancellation	Rating 7.1 11,765 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $177	Free Cancellation	Rating 7.9 12,600 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.

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Popular cities in Illinois

Flights to New Yorkfrom $73

Flights to Los Angelesfrom $60

Flights to Orlandofrom $62

Flights to Miamifrom $78

Flights to Chicagofrom $69

Flights to San Franciscofrom $55

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $55

Flights to Bostonfrom $88

Flights to Atlantafrom $58

Flights to Fort Lauderdalefrom $59

Flights to Dallasfrom $104

Cheap flights from the United States to Illinois from $91

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 8/1. 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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United Airlines flights from United States to Illinois

Our best United Airlines 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

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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

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

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According to popular flight searches on momondo this year

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