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

The number of flights available between United States and Illinois is 3,224 per week as of November 2025. The most frequent departure day is Thu, with 19% of weekly flights leaving on this day.

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 day?

As of November 2025, 460 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.

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 45m 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.

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 November 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.

$44 Cheap Flights from the United States to Illinois in 2025/26

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Find the cheapest flights from the United States to Illinois

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One-way

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

Enter your travel dates to find the best prices.

7:42 pm - 6:05 amDFW-ORD

10h 23m1 stop

7:20 am - 9:58 amORD-DFW

2h 38mnonstop

$88Spirit Airlines

Find Deal

mié., dic. 10 - mar., dic. 16

1:22 pm - 3:47 pmDFW-ORD

2h 25mnonstop

9:47 am - 12:43 pmORD-DFW

2h 56mnonstop

$89Multiple Airlines

Find Deal

sáb., dic. 6 - dom., dic. 14

5:18 am - 7:46 amDFW-ORD

2h 28mnonstop

4:49 pm - 7:29 pmORD-DFW

2h 40mnonstop

$90Multiple Airlines

Find Deal

mié., nov. 26 - sáb., dic. 6

1:00 pm - 2:57 pmJFK-ORD

2h 57mnonstop

4:01 pm - 12:59 amORD-JFK

7h 58m1 stop

$93Frontier

Find Deal

mié., dic. 10 - mié., dic. 17

10:22 pm - 12:52 amDFW-ORD

2h 30mnonstop

4:01 pm - 10:54 pmORD-DFW

6h 53m1 stop

$93Frontier

Find Deal

lun., nov. 24 - mié., dic. 10

7:01 pm - 9:14 pmBOS-ORD

3h 13mnonstop

7:00 am - 10:29 amORD-BOS

2h 29mnonstop

$123American Airlines

Find Deal

jue., dic. 11 - dom., dic. 14

6:00 am - 8:00 amBOS-ORD

3h 00mnonstop

9:12 pm - 12:45 amORD-BOS

2h 33mnonstop

$124United Airlines

Find Deal

jue., dic. 11 - jue., dic. 18

12:25 am - 6:19 amLAX-ORD

3h 54mnonstop

1:00 pm - 3:30 pmORD-LAX

4h 30mnonstop

$159United Airlines

Find Deal

sáb., dic. 13 - mié., dic. 17

6:00 am - 12:24 pmSFO-ORD

4h 24mnonstop

8:35 am - 11:26 amORD-SFO

4h 51mnonstop

$287American Airlines

Find Deal

jue., dic. 4 - mar., dic. 9

5:15 am - 1:30 pmSFO-ORD

6h 15m1 stop

1:00 pm - 8:10 pmORD-SFO

9h 10m2 stops

$294Southwest

Find Deal

sáb., dic. 6 - mié., dic. 10

Delta flights from United States to Illinois

Our best Delta deals on United States to Illinois flight tickets

Delta

Dec 11

BOS7:30 amBoston Logan Intl

3h 03m

ORD9:33 amChicago O'Hare Intl

Dec 17

ORD7:10 pmChicago O'Hare Intl

2h 24m

BOS10:34 pmBoston Logan Intl

$117

Find similar

Delta

Dec 11

BOS4:05 pmBoston Logan Intl

2h 57m

ORD6:02 pmChicago O'Hare Intl

Dec 14

ORD7:10 amChicago O'Hare Intl

2h 26m

BOS10:36 amBoston Logan Intl

$118

Find similar

Delta

Dec 9

BOS12:50 pmBoston Logan Intl

2h 57m

ORD2:47 pmChicago O'Hare Intl

Dec 18

ORD7:10 amChicago O'Hare Intl

2h 26m

BOS10:36 amBoston Logan Intl

$134

Find similar

American Airlines flights from United States to Illinois

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

American Airlines

Dec 11

BOS7:01 pmBoston Logan Intl

3h 13m

ORD9:14 pmChicago O'Hare Intl

Dec 14

ORD7:00 amChicago O'Hare Intl

2h 29m

BOS10:29 amBoston Logan Intl

$123

Find similar

American Airlines

Dec 3

JFK9:00 amNew York John F Kennedy Intl

2h 49m

ORD10:49 amChicago O'Hare Intl

Dec 3

ORD4:04 pmChicago O'Hare Intl

2h 25m

JFK7:29 pmNew York John F Kennedy Intl

$141

Find similar

American Airlines

Dec 4

JFK9:00 amNew York John F Kennedy Intl

2h 49m

ORD10:49 amChicago O'Hare Intl

Dec 6

ORD4:39 pmChicago O'Hare Intl

2h 21m

JFK8:00 pmNew York John F Kennedy Intl

$142

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

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

mié. 12/10

7:42 pm-6:05 am

1 stop10h 23m

Chicago O'Hare Intl

mar. 12/16

7:20 am-9:58 am

Nonstop2h 38m

$88

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

sáb. 12/6

1:22 pm-3:47 pm

Nonstop2h 25m

Chicago O'Hare Intl

dom. 12/14

9:47 am-12:43 pm

Nonstop2h 56m

$89

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

mié. 11/26

5:18 am-7:46 am

Nonstop2h 28m

Chicago O'Hare Intl

sáb. 12/6

4:49 pm-7:29 pm

Nonstop2h 40m

$90

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

mié. 12/10

1:00 pm-2:57 pm

Nonstop2h 57m

Chicago O'Hare Intl

mié. 12/17

4:01 pm-12:59 am

1 stop7h 58m

$93

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

lun. 11/24

10:22 pm-12:52 am

Nonstop2h 30m

Chicago O'Hare Intl

mié. 12/10

4:01 pm-10:54 pm

1 stop6h 53m

$93

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

jue. 12/11

7:01 pm-9:14 pm

Nonstop3h 13m

Chicago O'Hare Intl

dom. 12/14

7:00 am-10:29 am

Nonstop2h 29m

$123

BostonChicago

BOS - ORD

BOSORD

Boston Logan Intl

jue. 12/11

6:00 am-8:00 am

Nonstop3h 00m

Chicago O'Hare Intl

jue. 12/18

9:12 pm-12:45 am

Nonstop2h 33m

$124

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

sáb. 12/13

12:25 am-6:19 am

Nonstop3h 54m

Chicago O'Hare Intl

mié. 12/17

1:00 pm-3:30 pm

Nonstop4h 30m

$159

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

jue. 12/4

6:00 am-12:24 pm

Nonstop4h 24m

Chicago O'Hare Intl

mar. 12/9

8:35 am-11:26 am

Nonstop4h 51m

$287

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

sáb. 12/6

5:15 am-1:30 pm

1 stop6h 15m

Chicago O'Hare Intl

mié. 12/10

1:00 pm-8:10 pm

2 stops9h 10m

$294

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 $184, 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 $358. Flights from United States to Illinois on a Sunday will generally be more expensive and average around $453. 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 $276. Flights at noon are often more expensive with an average ticket price of $459.

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 $250 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 $189 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	$49
Fastest flight time	2h 08m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from United States in the past 72 hours is $49. The best round-trip flight deal from United States to Illinois found on momondo in the last 72 hours is $71.

The fastest flight from United States to Illinois takes 2h 08m

Direct flights go from United States to Illinois every day.

There is 1 airport near Illinois: 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 November 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 22.45% of the total bookings. Other popular models include Boeing 737-900 with 10.94%, Airbus A321neo with 10.78%, and Boeing 737 MAX 8 with 7.48%.

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 3,113 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $59	Free Cancellation	Rating 6.3 8,139 reviews	Search Spirit Airlines flights
Allegiant Air	PriceFrom $77	Free Cancellation	Rating 7.2 698 reviews	Search Allegiant Air flights
JetBlue	PriceFrom $79	Free Cancellation	Rating 7.2 2,906 reviews	Search JetBlue flights
Delta	PriceFrom $101	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,809 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $117	Free Cancellation	Rating 8.0 4,236 reviews	Search Southwest flights
Breeze Airways	PriceFrom $121	Free Cancellation	Rating 8.1 230 reviews	Search Breeze Airways flights
United Airlines	PriceFrom $126	Free Cancellation	Rating 7.4 9,015 reviews	Search United Airlines flights
Sun Country Air	PriceFrom $130	Free Cancellation	Rating 6.9 336 reviews	Search Sun Country Air 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.