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Cheap flights from Illinois to the United States from $41

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 3/4. 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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0 bags

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Find the cheapest flights from Illinois to the United States

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:40 am - 10:04 am
ORD
-
JFK
2h 24mnonstop
Frontier Logo
11:03 am - 1:03 pm
JFK
-
ORD
3h 00mnonstop
$77Frontier
Sun, Feb 15 - Fri, Feb 27
Frontier Logo
6:40 am - 10:04 am
ORD
-
JFK
2h 24mnonstop
Frontier Logo
11:03 am - 1:03 pm
JFK
-
ORD
3h 00mnonstop
$78Frontier
Sun, Feb 22 - Sun, Mar 1
Frontier Logo
6:40 am - 10:04 am
ORD
-
JFK
2h 24mnonstop
Frontier Logo
11:03 am - 1:03 pm
JFK
-
ORD
3h 00mnonstop
$79Frontier
Sun, Feb 22 - Sun, Mar 1
Frontier Logo
5:40 am - 8:57 am
ORD
-
ATL
2h 17mnonstop
Frontier Logo
12:16 pm - 1:37 pm
ATL
-
ORD
2h 21mnonstop
$79Frontier
Thu, Jan 29 - Sun, Feb 1
Frontier Logo
12:05 pm - 3:29 pm
ORD
-
JFK
2h 24mnonstop
Frontier Logo
4:29 pm - 6:29 pm
JFK
-
ORD
3h 00mnonstop
$80Frontier
Fri, Mar 6 - Tue, Mar 10
Frontier Logo
8:10 am - 11:25 am
ORD
-
ATL
2h 15mnonstop
Frontier Logo
12:16 pm - 1:37 pm
ATL
-
ORD
2h 21mnonstop
$80Frontier
Wed, Feb 4 - Sun, Feb 8
Multiple Airlines Logo
2:53 pm - 6:16 pm
ORD
-
ATL
2h 23mnonstop
Multiple Airlines Logo
3:26 pm - 11:46 pm
ATL
-
ORD
9h 20m1 stop
$84Multiple Airlines
Tue, Jan 27 - Wed, Jan 28
Spirit Airlines Logo
6:57 pm - 11:14 pm
ORD
-
MIA
3h 17mnonstop
Spirit Airlines Logo
5:54 am - 8:18 am
MIA
-
ORD
3h 24mnonstop
$85Spirit Airlines
Sat, Jan 31 - Mon, Feb 9
Spirit Airlines Logo
6:57 pm - 11:14 pm
ORD
-
MIA
3h 17mnonstop
Spirit Airlines Logo
5:54 am - 8:18 am
MIA
-
ORD
3h 24mnonstop
$86Spirit Airlines
Thu, Jan 22 - Tue, Jan 27
Spirit Airlines Logo
7:20 am - 2:20 pm
ORD
-
ATL
6h 00m1 stop
Spirit Airlines Logo
3:26 pm - 9:03 pm
ATL
-
ORD
6h 37m1 stop
$86Spirit Airlines
Wed, Jan 21 - Tue, Jan 27

United Airlines flights from Illinois to United States

Our best United Airlines deals on Illinois to United States flight tickets
United Airlines
Feb 18
ORD10:30 amChicago O'Hare Intl
2h 08m
ATL1:38 pmAtlanta Hartsfield-Jackson
Feb 19
ATL8:15 amAtlanta Hartsfield-Jackson
2h 18m
ORD9:33 amChicago O'Hare Intl
$127
United Airlines
Jan 17
ORD8:10 pmChicago O'Hare Intl
4h 49m
LAX10:59 pmLos Angeles
Jan 19
LAX12:30 amLos Angeles
4h 00m
ORD6:30 amChicago O'Hare Intl
$159
United Airlines
Jan 18
ORD2:40 pmChicago O'Hare Intl
7h 47m
1 stop
LAS8:27 pmLas Vegas Harry Reid Intl
Jan 20
LAS11:30 pmLas Vegas Harry Reid Intl
3h 36m
ORD5:06 amChicago O'Hare Intl
$181

Spirit Airlines flights from Illinois to United States

Our best Spirit Airlines deals on Illinois to United States flight tickets
Spirit Airlines
Jan 31
ORD6:57 pmChicago O'Hare Intl
3h 17m
MIA11:14 pmMiami
Feb 9
MIA5:54 amMiami
3h 24m
ORD8:18 amChicago O'Hare Intl
$85
Spirit Airlines
Jan 22
ORD6:57 pmChicago O'Hare Intl
3h 17m
MIA11:14 pmMiami
Jan 27
MIA5:54 amMiami
3h 24m
ORD8:18 amChicago O'Hare Intl
$86
Spirit Airlines
Feb 7
ORD6:57 pmChicago O'Hare Intl
3h 17m
MIA11:14 pmMiami
Feb 10
MIA5:54 amMiami
3h 24m
ORD8:18 amChicago O'Hare Intl
$87

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to United States that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Illinois to the United States that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoNew York

ORD - JFK

ORDJFK

Chicago O'Hare Intl

Sun 2/15

6:40 am-10:04 am

Nonstop2h 24m

New York John F Kennedy Intl

Fri 2/27

11:03 am-1:03 pm

Nonstop3h 00m

$77

ChicagoNew York

ORD - JFK

ORDJFK

Chicago O'Hare Intl

Sun 2/22

6:40 am-10:04 am

Nonstop2h 24m

New York John F Kennedy Intl

Sun 3/1

11:03 am-1:03 pm

Nonstop3h 00m

$78

ChicagoNew York

ORD - JFK

ORDJFK

Chicago O'Hare Intl

Sun 2/22

6:40 am-10:04 am

Nonstop2h 24m

New York John F Kennedy Intl

Sun 3/1

11:03 am-1:03 pm

Nonstop3h 00m

$79

ChicagoAtlanta

ORD - ATL

ORDATL

Chicago O'Hare Intl

Thu 1/29

5:40 am-8:57 am

Nonstop2h 17m

Atlanta Hartsfield-Jackson

Sun 2/1

12:16 pm-1:37 pm

Nonstop2h 21m

$79

ChicagoNew York

ORD - JFK

ORDJFK

Chicago O'Hare Intl

Fri 3/6

12:05 pm-3:29 pm

Nonstop2h 24m

New York John F Kennedy Intl

Tue 3/10

4:29 pm-6:29 pm

Nonstop3h 00m

$80

ChicagoAtlanta

ORD - ATL

ORDATL

Chicago O'Hare Intl

Wed 2/4

8:10 am-11:25 am

Nonstop2h 15m

Atlanta Hartsfield-Jackson

Sun 2/8

12:16 pm-1:37 pm

Nonstop2h 21m

$80

ChicagoAtlanta

ORD - ATL

ORDATL

Chicago O'Hare Intl

Tue 1/27

2:53 pm-6:16 pm

Nonstop2h 23m

Atlanta Hartsfield-Jackson

Wed 1/28

3:26 pm-11:46 pm

1 stop9h 20m

$84

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Sat 1/31

6:57 pm-11:14 pm

Nonstop3h 17m

Miami

Mon 2/9

5:54 am-8:18 am

Nonstop3h 24m

$85

ChicagoMiami

ORD - MIA

ORDMIA

Chicago O'Hare Intl

Thu 1/22

6:57 pm-11:14 pm

Nonstop3h 17m

Miami

Tue 1/27

5:54 am-8:18 am

Nonstop3h 24m

$86

ChicagoAtlanta

ORD - ATL

ORDATL

Chicago O'Hare Intl

Wed 1/21

7:20 am-2:20 pm

1 stop6h 00m

Atlanta Hartsfield-Jackson

Tue 1/27

3:26 pm-9:03 pm

1 stop6h 37m

$86

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to the United States from

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?

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 $148. If you aren’t able to travel during the month of January, then book flights to United States from Illinois during February instead. Flights to United States in February, while not as cheap as those in January, still average around $184.

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

According to our data, Saturday is the cheapest day to fly to United States from Illinois. The lowest ticket price found for a Saturday departure recently was $260. 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 $376. 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 $227. Try not to purchase tickets at noon because they tend to be around $378. 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 Midway to Miami 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 $218 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 $146 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

$28

Fastest flight time

0h 27m

Direct flights

Every day

Airports in United States

4,296 airports
The best one-way flight to United States from Illinois in the past 72 hours is $28. The best round-trip flight deal from Illinois to United States found on momondo in the last 72 hours is $61.
The fastest flight from Illinois to United States takes 0h 27m
Direct flights go from Illinois to United States every day.
There are 4,296 airports in United States. From Illinois there are direct flights to Atlanta Hartsfield-Jackson (ATL), New York John F Kennedy Intl (JFK).
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?

  • 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?

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 AirlinesPriceFrom $42Free CancellationRating
6.3
8,287 reviews
Search Spirit Airlines flights
FrontierPriceFrom $43Free CancellationRating
5.7
3,062 reviews
Search Frontier flights
JetBluePriceFrom $73Free CancellationRating
7.2
2,896 reviews
Search JetBlue flights
Allegiant AirPriceFrom $73Free CancellationRating
7.2
702 reviews
Search Allegiant Air flights
Breeze AirwaysPriceFrom $78Free CancellationRating
8.2
255 reviews
Search Breeze Airways flights
DeltaPriceFrom $98Free CancellationRating
7.9
8,025 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $108Free CancellationRating
7.8
2,824 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $117Free CancellationRating
7.2
11,095 reviews
Search American Airlines flights
United AirlinesPriceFrom $117Free CancellationRating
7.4
9,139 reviews
Search United Airlines flights
SouthwestPriceFrom $135Free CancellationRating
8.0
4,250 reviews
Search Southwest 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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