Cheap flights from Illinois to the United States from $38
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 7/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.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
JetBlue flights from Illinois to United States
Our best JetBlue deals on Illinois to United States flight tickets
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 $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 $157.
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 $250. 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 $366. 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 $233. Try not to purchase tickets at noon because they tend to be around $372. 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 10 weeks ahead of your departure date. In general, you can expect to find flights to United States for around $225 when searching 10 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 $168 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.
What is the cheapest airline that flies from Illinois to United States?
Spirit Airlines, United Airlines, and JetBlue are the most popular carriers operating from Illinois to United States
What airlines fly to United States?
American Airlines, United Airlines and Spirit Airlines 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 36% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 11 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to United States on average per day?
633 flights are operational daily from Illinois to United States as of June 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 June 2025, there are 4,433 flights per week flying from Illinois to United States. The most common day of the week flights depart is Mon, with 16% of flights taking off on this day.
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 | $38 |
|---|---|
Fastest flight time | 2h 02m |
Direct flights | Every day |
Airports in United States | 8 airports |
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 12 operators available for flights from Illinois to United States as of June 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 21.10% of all bookings. The subsequent popular models are Airbus A321neo at 14.08%, Airbus A320neo at 9.27%, and Boeing 737-900 at 8.43%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $35 | Free Cancellation | Rating 6.3 8,060 reviews | |||
| PriceFrom $48 | Free Cancellation | Rating 5.9 3,296 reviews | |||
| PriceFrom $49 | Free Cancellation | Rating 7.3 722 reviews | |||
| PriceFrom $79 | Free Cancellation | Rating 7.3 2,922 reviews | |||
| PriceFrom $88 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $89 | Free Cancellation | Rating 7.8 2,501 reviews | |||
| PriceFrom $125 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $130 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $143 | Free Cancellation | Rating 8.0 4,278 reviews | |||
| PriceFrom $147 | Free Cancellation | Rating 6.9 345 reviews |
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.