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

469 flights are operational daily from Illinois to United States as of July 2025. The most popular departure time for this route is 6:00PM, with 38% of flights per day taking off at noon.

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

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

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

As of July 2025, there are 3,286 flights per week flying from Illinois to United States. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.

What airlines fly to United States?

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to United States from Illinois according to our data. American Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 12 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

How long is the flight from Illinois to United States?

Flight times vary depending on what airport in Illinois you fly out of and what airport in United States you fly into. For example, flying from Chicago to Los Angeles takes 4h 19m on average. On the other hand, flying from Moline to Los Angeles takes 6h 17m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

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

Prices for flights from Illinois to United States refresh daily.

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

There are 11 operators available for flights from Illinois to United States as of July 2025.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to United States.

What documentation or ID do you need to fly to United States?

The travel and health documents required for your trip to United States 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 United States. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$31 Cheap Flights from Illinois to the United States in 2025

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Find the cheapest flights from Illinois to the United States

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

5:25 am - 7:58 amORD-DFW

2h 33mnonstop

8:53 am - 11:33 amDFW-ORD

2h 40mnonstop

$49Frontier

Find Deal

Thu, Oct 16 - Mon, Oct 20

5:25 am - 7:58 amORD-DFW

2h 33mnonstop

5:53 pm - 8:24 pmDFW-ORD

2h 31mnonstop

$59Frontier

Find Deal

Thu, Oct 9 - Sat, Oct 11

11:12 am - 2:17 pmORD-LGA

2h 05mnonstop

3:12 pm - 4:50 pmLGA-ORD

2h 38mnonstop

$69Spirit Airlines

Find Deal

Sat, Sep 13 - Sat, Sep 20

11:13 am - 2:18 pmORD-LGA

2h 05mnonstop

3:13 pm - 4:51 pmLGA-ORD

2h 38mnonstop

$70Spirit Airlines

Find Deal

Wed, Sep 10 - Wed, Sep 17

9:56 pm - 12:05 amORD-LAS

4h 09mnonstop

11:10 pm - 4:50 amLAS-ORD

3h 40mnonstop

$111

Find Deal

Sun, Aug 17 - Wed, Aug 20

6:21 pm - 8:11 pmORD-LAS

3h 50mnonstop

2:44 pm - 8:50 pmLAS-ORD

4h 06mnonstop

$113

Find Deal

Tue, Aug 19 - Fri, Aug 22

7:30 am - 11:01 amORD-BOS

2h 31mnonstop

4:27 pm - 6:21 pmBOS-ORD

2h 54mnonstop

$117United Airlines

Find Deal

Wed, Sep 3 - Wed, Sep 3

7:10 pm - 10:40 pmORD-BOS

2h 30mnonstop

8:35 am - 10:32 amBOS-ORD

2h 57mnonstop

$120American Airlines

Find Deal

Wed, Sep 3 - Thu, Sep 4

6:30 am - 9:56 amORD-BOS

2h 26mnonstop

6:10 am - 8:05 amBOS-ORD

2h 55mnonstop

$127United Airlines

Find Deal

Thu, Sep 4 - Fri, Sep 5

8:25 pm - 11:53 pmORD-BOS

2h 28mnonstop

7:01 am - 9:05 amBOS-ORD

3h 04mnonstop

$128American Airlines

Find Deal

Thu, Sep 4 - Sun, Sep 7

Spirit Airlines flights from Illinois to United States

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

Spirit Airlines

Sep 13

ORD11:12 amChicago O'Hare Intl

2h 05m

LGA2:17 pmNew York LaGuardia

Sep 20

LGA3:12 pmNew York LaGuardia

2h 38m

ORD4:50 pmChicago O'Hare Intl

$69

Find similar

Spirit Airlines

Sep 10

ORD11:13 amChicago O'Hare Intl

2h 05m

LGA2:18 pmNew York LaGuardia

Sep 17

LGA3:13 pmNew York LaGuardia

2h 38m

ORD4:51 pmChicago O'Hare Intl

$70

Find similar

Spirit Airlines

Sep 17

ORD11:13 amChicago O'Hare Intl

2h 05m

LGA2:18 pmNew York LaGuardia

Sep 20

LGA8:36 pmNew York LaGuardia

2h 35m

ORD10:11 pmChicago O'Hare Intl

$71

Find similar

United Airlines flights from Illinois to United States

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

United Airlines

Sep 3

ORD7:30 amChicago O'Hare Intl

2h 31m

BOS11:01 amBoston Logan Intl

Sep 3

BOS4:27 pmBoston Logan Intl

2h 54m

ORD6:21 pmChicago O'Hare Intl

$117

Find similar

United Airlines

Sep 4

ORD6:30 amChicago O'Hare Intl

2h 26m

BOS9:56 amBoston Logan Intl

Sep 5

BOS6:10 amBoston Logan Intl

2h 55m

ORD8:05 amChicago O'Hare Intl

$127

Find similar

United Airlines

Aug 31

ORD6:30 amChicago O'Hare Intl

2h 26m

BOS9:56 amBoston Logan Intl

Sep 3

BOS9:43 amBoston Logan Intl

2h 50m

ORD11:33 amChicago O'Hare Intl

$139

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoDallas

ORD - DFW

ORDDFW

Chicago O'Hare Intl

Thu 10/16

5:25 am-7:58 am

Nonstop2h 33m

Dallas/Fort Worth

Mon 10/20

8:53 am-11:33 am

Nonstop2h 40m

$49

ChicagoDallas

ORD - DFW

ORDDFW

Chicago O'Hare Intl

Thu 10/9

5:25 am-7:58 am

Nonstop2h 33m

Dallas/Fort Worth

Sat 10/11

5:53 pm-8:24 pm

Nonstop2h 31m

$59

ChicagoNew York

ORD - LGA

ORDLGA

Chicago O'Hare Intl

Sat 9/13

11:12 am-2:17 pm

Nonstop2h 05m

New York LaGuardia

Sat 9/20

3:12 pm-4:50 pm

Nonstop2h 38m

$69

ChicagoNew York

ORD - LGA

ORDLGA

Chicago O'Hare Intl

Wed 9/10

11:13 am-2:18 pm

Nonstop2h 05m

New York LaGuardia

Wed 9/17

3:13 pm-4:51 pm

Nonstop2h 38m

$70

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Sun 8/17

9:56 pm-12:05 am

Nonstop4h 09m

Las Vegas Harry Reid Intl

Wed 8/20

11:10 pm-4:50 am

Nonstop3h 40m

$111

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Tue 8/19

6:21 pm-8:11 pm

Nonstop3h 50m

Las Vegas Harry Reid Intl

Fri 8/22

2:44 pm-8:50 pm

Nonstop4h 06m

$113

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Wed 9/3

7:30 am-11:01 am

Nonstop2h 31m

Boston Logan Intl

Wed 9/3

4:27 pm-6:21 pm

Nonstop2h 54m

$117

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Wed 9/3

7:10 pm-10:40 pm

Nonstop2h 30m

Boston Logan Intl

Thu 9/4

8:35 am-10:32 am

Nonstop2h 57m

$120

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Thu 9/4

6:30 am-9:56 am

Nonstop2h 26m

Boston Logan Intl

Fri 9/5

6:10 am-8:05 am

Nonstop2h 55m

$127

ChicagoBoston

ORD - BOS

ORDBOS

Chicago O'Hare Intl

Thu 9/4

8:25 pm-11:53 pm

Nonstop2h 28m

Boston Logan Intl

Sun 9/7

7:01 am-9:05 am

Nonstop3h 04m

$128

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 Illinois to United States

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 United States?

In general, January is the cheapest month to fly from Illinois to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $157. If you aren’t able to travel during the month of January, then book flights to United States from Illinois during September instead. Flights to United States in September, while not as cheap as those in January, still average around $159.

What is the cheapest day to depart on your flight to United States?

According to our data, Thursday is the cheapest day to fly to United States from Illinois. The lowest ticket price found for a Thursday departure recently was $259. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $379. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

What is the cheapest time of day to depart on your flight to United States?

The cheapest time of day to fly to United States is in the evening when flights can be purchased for as low as $235. Try not to purchase tickets at noon because they tend to be around $390. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Illinois to United States flight route?

Fly from Chicago O'Hare Intl to Atlanta Hartsfield-Jackson for the best Illinois - United States flight prices

How far in advance should I book a flight to United States?

You are more likely to see cheaper flights to United States from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $226 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Illinois for as low as $176 on momondo.

What cabin class options are available on Illinois to United States flights?

There are 4 cabin classes available to choose from on Illinois to United States 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 Illinois to United States flights?

No. A direct flight is the cheapest option for a flight between Illinois to United States.

Cheap Illinois to United States flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to United States

Best Price Found	$31
Fastest flight time	2h 03m
Direct flights	Every day
Airports in United States	7 airports

The best one-way flight to United States from Illinois in the past 72 hours is $31. The best round-trip flight deal from Illinois to United States found on momondo in the last 72 hours is $49.

The fastest flight from Illinois to United States takes 2h 03m

Direct flights go from Illinois to United States every day.

There are 7 airports near United States: Newark (EWR), Los Angeles (LAX), Dallas/Fort Worth (DFW), New York LaGuardia (LGA), Denver Intl (DEN), New York John F Kennedy Intl (JFK), Las Vegas Harry Reid Intl (LAS)

Search flight deals

When did momondo last update prices for flights from Illinois to United States?
Prices for flights from Illinois to United States refresh daily.
How many operators does momondo search for flights from Illinois to United States?
There are 11 operators available for flights from Illinois to United States as of July 2025.
How old do you have to be to fly from Illinois to United States?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to United States.
What documentation or ID do you need to fly to United States?
The travel and health documents required for your trip to United States 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 United States. 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 Illinois to United States?
momondo data reveals that the most frequently booked plane model on the route from Illinois to United States is Boeing 737-800, representing 21.84% of all bookings. The subsequent popular models are Airbus A321neo at 11.47%, Boeing 737-900 at 8.81%, and Airbus A321-100/200 at 7.94%.

Best airlines flying from Illinois to United States

Compare and see reviews for airlines that fly from Illinois to United States with momondo

Airline	Rating	Free Cancellation	Price
Spirit Airlines	PriceFrom $35	Free Cancellation	Rating 6.3 8,049 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $50	Free Cancellation	Rating 5.9 3,239 reviews	Search Frontier flights
JetBlue	PriceFrom $78	Free Cancellation	Rating 7.2 2,914 reviews	Search JetBlue flights
Breeze Airways	PriceFrom $78	Free Cancellation	Rating 8.0 191 reviews	Search Breeze Airways flights
Allegiant Air	PriceFrom $81	Free Cancellation	Rating 7.2 702 reviews	Search Allegiant Air flights
Delta	PriceFrom $88	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,611 reviews	Search Hawaiian Airlines flights
Sun Country Air	PriceFrom $112	Free Cancellation	Rating 6.9 334 reviews	Search Sun Country Air flights
American Airlines	PriceFrom $122	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $127	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to United States. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to United States from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Illinois and United States by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Illinois to United States right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Illinois to United States flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Popular cities in the United States

Flights to New Yorkfrom $39

Flights to Los Angelesfrom $37

Flights to Miamifrom $58

Flights to Chicagofrom $59

Flights to Orlandofrom $54

Flights to Las Vegasfrom $35

Flights to San Franciscofrom $49

Flights to Washington, D.C.from $49

Flights to Bostonfrom $77

Flights to Atlantafrom $29

Flights to Dallasfrom $55

Flights to Seattlefrom $93

Cheap flights from Illinois to the United States from $31

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to the United States departing on 10/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Find the cheapest flights from Illinois to the United States

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Spirit Airlines flights from Illinois to United States

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

United Airlines flights from Illinois to United States

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

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

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How to get the cheapest flight ticket from Illinois to United States

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

What is the cheapest month to fly to United States?

What is the cheapest day to depart on your flight to United States?

What is the cheapest time of day to depart on your flight to United States?

The cheapest time of day to fly to United States is in the evening when flights can be purchased for as low as $235. Try not to purchase tickets at noon because they tend to be around $390. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Illinois to United States flight route?

Fly from Chicago O'Hare Intl to Atlanta Hartsfield-Jackson for the best Illinois - United States flight prices

How far in advance should I book a flight to United States?

What cabin class options are available on Illinois to United States flights?

There are 4 cabin classes available to choose from on Illinois to United States 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 Illinois to United States flights?

No. A direct flight is the cheapest option for a flight between Illinois to United States.

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

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

What airlines fly to United States?

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

469 flights are operational daily from Illinois to United States as of July 2025. The most popular departure time for this route is 6:00PM, with 38% of flights per day taking off at noon.

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

As of July 2025, there are 3,286 flights per week flying from Illinois to United States. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.

How long is the flight from Illinois to United States?

Cheap Illinois to United States flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to United States

Best Price Found

Fastest flight time

Direct flights

Airports in United States

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

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

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

What documentation or ID do you need to fly to United States?

What is the most popular plane model from Illinois to United States?

Best airlines flying from Illinois to United States

Compare and see reviews for airlines that fly from Illinois to United States with momondo

Why use momondo?

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

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

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

I’m not ready to book a flight from Illinois to United States right now. Can momondo alert me if prices change?

An easier way to manage your United States 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 the United States

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo