Cheap flights from the United States to Illinois from $23
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 9/28. 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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Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from United States to Illinois by changing tabs
Spirit Airlines![Spirit Airlines]()
Oct 5![Spirit Airlines]()
Oct 8
BOS11:35 amBoston Logan Intl
2h 52m
ORD1:27 pmChicago O'Hare Intl
ORD2:17 pmChicago O'Hare Intl
2h 25m
BOS5:42 pmBoston Logan Intl
Frontier![Frontier]()
Aug 19![Frontier]()
Aug 20
DFW7:20 amDallas/Fort Worth
2h 37m
ORD9:57 amChicago O'Hare Intl
ORD8:00 amChicago O'Hare Intl
2h 29m
DFW10:29 amDallas/Fort Worth
Multiple Airlines![Multiple Airlines]()
Aug 15![Multiple Airlines]()
Aug 21
DFW3:19 pmDallas/Fort Worth
2h 36m
ORD5:55 pmChicago O'Hare Intl
ORD7:20 amChicago O'Hare Intl
2h 29m
DFW9:49 amDallas/Fort Worth
Alaska Airlines![Alaska Airlines]()
Sep 25![Alaska Airlines]()
Sep 29
SEA5:45 pmSeattle/Tacoma Intl
4h 03m
ORD11:48 pmChicago O'Hare Intl
ORD8:40 amChicago O'Hare Intl
4h 34m
SEA11:14 amSeattle/Tacoma Intl
Spirit Airlines![Spirit Airlines]()
Sep 7![Spirit Airlines]()
Sep 14
BOS11:35 amBoston Logan Intl
2h 52m
ORD1:27 pmChicago O'Hare Intl
ORD2:17 pmChicago O'Hare Intl
2h 25m
BOS5:42 pmBoston Logan Intl
Find the cheapest one-way flights from United States to Illinois
If you're looking for one-way flights from United States to Illinois, view some of our deals below provided by American Airlines, Frontier and Spirit Airlines
Find the cheapest direct flights from the United States to Illinois
Spirit Airlines![Spirit Airlines]()
Oct 5![Spirit Airlines]()
Oct 8
BOS11:35 amBoston Logan Intl
2h 52m
ORD1:27 pmChicago O'Hare Intl
ORD2:17 pmChicago O'Hare Intl
2h 25m
BOS5:42 pmBoston Logan Intl
Frontier![Frontier]()
Aug 19![Frontier]()
Aug 20
DFW7:20 amDallas/Fort Worth
2h 37m
ORD9:57 amChicago O'Hare Intl
ORD8:00 amChicago O'Hare Intl
2h 29m
DFW10:29 amDallas/Fort Worth
Multiple Airlines![Multiple Airlines]()
Aug 15![Multiple Airlines]()
Aug 21
DFW3:19 pmDallas/Fort Worth
2h 36m
ORD5:55 pmChicago O'Hare Intl
ORD7:20 amChicago O'Hare Intl
2h 29m
DFW9:49 amDallas/Fort Worth
Spirit Airlines![Spirit Airlines]()
Sep 7![Spirit Airlines]()
Sep 14
BOS11:35 amBoston Logan Intl
2h 52m
ORD1:27 pmChicago O'Hare Intl
ORD2:17 pmChicago O'Hare Intl
2h 25m
BOS5:42 pmBoston Logan Intl
Spirit Airlines![Spirit Airlines]()
Aug 27![Spirit Airlines]()
Sep 10
BOS8:00 amBoston Logan Intl
2h 53m
ORD9:53 amChicago O'Hare Intl
ORD2:17 pmChicago O'Hare Intl
2h 25m
BOS5:42 pmBoston Logan Intl
Search last-minute flights to Illinois from United States
Find and compare round-trip flight prices for your last-minute flight from United States to Illinois
Spirit Airlines![Spirit Airlines]()
Aug 7![Spirit Airlines]()
Aug 14
BOS6:35 amBoston Logan Intl
2h 54m
ORD8:29 amChicago O'Hare Intl
ORD5:03 pmChicago O'Hare Intl
5h 17m
1 stop
BOS11:20 pmBoston Logan Intl
Multiple Airlines![Multiple Airlines]()
Jul 31![Multiple Airlines]()
Aug 14
BOS6:00 amBoston Logan Intl
5h 49m
1 stop
ORD10:49 amChicago O'Hare Intl
ORD6:00 amChicago O'Hare Intl
13h 06m
1 stop
BOS8:06 pmBoston Logan Intl
Frontier![Frontier]()
Aug 1![Frontier]()
Aug 6
DFW10:25 pmDallas/Fort Worth
2h 34m
ORD12:59 amChicago O'Hare Intl
ORD6:45 pmChicago O'Hare Intl
2h 35m
DFW9:20 pmDallas/Fort Worth
Spirit Airlines![Spirit Airlines]()
Aug 7![Spirit Airlines]()
Aug 13
BOS6:35 amBoston Logan Intl
2h 54m
ORD8:29 amChicago O'Hare Intl
ORD9:33 pmChicago O'Hare Intl
2h 26m
BOS12:59 amBoston Logan Intl
Delta![Delta]()
Aug 4![Delta]()
Aug 7
JFK8:00 amNew York John F Kennedy Intl
2h 46m
ORD9:46 amChicago O'Hare Intl
ORD7:07 amChicago O'Hare Intl
2h 16m
JFK10:23 amNew York John F Kennedy Intl
Alaska Airlines flights from United States to Illinois
Our best Alaska Airlines deals on United States to Illinois flight tickets
Alaska Airlines![Alaska Airlines]()
Sep 25![Alaska Airlines]()
Sep 29
SEA5:45 pmSeattle/Tacoma Intl
4h 03m
ORD11:48 pmChicago O'Hare Intl
ORD8:40 amChicago O'Hare Intl
4h 34m
SEA11:14 amSeattle/Tacoma Intl
Alaska Airlines![Alaska Airlines]()
Sep 5![Alaska Airlines]()
Sep 9
JFK1:00 pmNew York John F Kennedy Intl
16h 40m
2 stops
ORD4:40 amChicago O'Hare Intl
ORD2:18 pmChicago O'Hare Intl
14h 43m
2 stops
JFK6:01 amNew York John F Kennedy Intl
Spirit Airlines flights from United States to Illinois
Our best Spirit Airlines deals on United States to Illinois flight tickets
Spirit Airlines![Spirit Airlines]()
Oct 5![Spirit Airlines]()
Oct 8
BOS11:35 amBoston Logan Intl
2h 52m
ORD1:27 pmChicago O'Hare Intl
ORD2:17 pmChicago O'Hare Intl
2h 25m
BOS5:42 pmBoston Logan Intl
Spirit Airlines![Spirit Airlines]()
Sep 7![Spirit Airlines]()
Sep 14
BOS11:35 amBoston Logan Intl
2h 52m
ORD1:27 pmChicago O'Hare Intl
ORD2:17 pmChicago O'Hare Intl
2h 25m
BOS5:42 pmBoston Logan Intl
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
What is the cheapest airline that flies to Illinois from United States?
Spirit Airlines. Spirit Airlines, Allegiant Air, and Frontier are the most popular carriers operating from United States to Illinois
What is the cheapest United States to Illinois flight route?
Detroit Metropolitan Wayne County - Chicago O'Hare Intl. Fly from Detroit Metropolitan Wayne County to Chicago O'Hare Intl for the best United States - Illinois flight prices
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
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 2024, 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.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $28 | Free Cancellation | Rating 6.3 8,407 reviews | |||
| PriceFrom $33 | Free Cancellation | Rating 6.2 3,835 reviews | |||
| PriceFrom $39 | Free Cancellation | Rating 8.0 9,365 reviews | |||
| PriceFrom $49 | Free Cancellation | Rating 7.4 938 reviews | |||
| PriceFrom $76 | Free Cancellation | Rating 7.6 3,996 reviews | |||
| PriceFrom $79 | Free Cancellation | Rating 8.0 9,630 reviews | |||
| PriceFrom $98 | Free Cancellation | Rating 7.4 10,000 reviews | |||
| PriceFrom $114 | Free Cancellation | Rating 7.3 10,000 reviews | |||
| PriceFrom $302 | Free Cancellation | Rating 7.0 515 reviews |
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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