$89 Find Cheap Flights from Illinois to the United States - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Useful Info

Good to know

Low season

January

Cheapest flight

$89
Best time to beat the crowds with an average 17% drop in price.
Flight from Chicago O'Hare Airport to Denver

Flights from Illinois to the United States: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Illinois to the United States 
IndivarFlew with American Airlines-Aug 2026
For a work trips, consider booking an Airline with multiple daily flights in case you might want standby for an earlier return flight.
MatthewFlew with United Airlines-Jul 2026
When in Seattle, take public trans at least to downtown as Uber/Lyft is expensive
KimberlyFlew with American Airlines-Aug 2026
Get to the airport early if you don’t have Pre-Check!
Verified travelerFlew with Air Canada-Aug 2026
Pray. Use Apple air tags. That way at least you know where your luggage is
Verified travelerFlew with United Airlines-Aug 2026
Make sure to have at least 2 hours layover because it is a huge airport and the airport is rather inefficient with unfriendly personnel.
MarkFlew with American Airlines-Jun 2026
Get there early, only one TSA line open and thew queue was very long.
NFlew with United Airlines-Jul 2026
Only do carry on the checked bag was stressful and time consuming.
AlejandroFlew with United Airlines-Apr 2026
expect some delays and be prepared, but once arrived to Lincoln, airport is very easy to navigate since it is very small. Prices are higher than other airports, but that is ok when looking for convenience.
IanFlew with American Airlines-Apr 2026
Lately ORD airport struggles in general often having ground stops. Construction extends travel back to airport so allow 2 hrs. Over past few months, experienced far few delays on United than AA.
SteveFlew with Spirit Airlines-Mar 2026
Bring a seat cushion if you're flying Spirit.
Verified travelerFlew with United Airlines-Apr 2026
Chicago airport is super chaotic. We had come in from an overseas flight and were required to get our checked bags at Baggage Claim and recheck them for our next flight, which took a while. Then after going through a LONG customs line (again) and rechecking my bag, I was told to take a shuttle to a different terminal for my final flight. Even though I never left the building and had no access to the outside world, I had to go through security AGAIN (boots off, dump out my water, wait in long lines…) My advice is to be sure you have at least a couple of hours between flights to deal with the insanity.
Verified travelerFlew with American Airlines-Apr 2026
travel to ohare is horror - work in extra time
Verified travelerFlew with ANA-Dec 2025
Give adequate time of more than 2 hours for your connection in Chicago O’Hare .. The terminals are not that far apart but still if it’s checked out and check in again process that involves TSA security screening again , 2 hours may not be enough ..
MarcoFlew with United Airlines-Dec 2025
United delayed my luggage twice on flight to Europe (first flight was for an important event) I carry 2 days of clothes in my backpack no matter who I'm flying with United especially so. No less than 2 hour layover to decrease possibility of loss/delay of luggage. Second EU trip my luggage was left in Germany even though my layover was just over 1 hour. Select layovers of 2+ hours although Unite will sell flights with 40 minutes layover (nonsense). 1 hour layover was not enough to transfer luggage in FRA. The last scan was 30 minutes after the flight left (SMH).
RogerFlew with Japan Airlines-Jun 2025
Make sure when you go from one airline to another that your bag is marked properly so they can get it on the right damn airplane. I did that and it still didn’t make it.
Verified travelerFlew with United Airlines-Mar 2025
If you can select your seats in advance please do
AndreaFlew with United Airlines-May 2025
Ask for stewards to assist and provide amenities or you won’t get them.
Verified travelerFlew with American Airlines-Dec 2024
I recommend having movies and songs downloaded on your device.
Dr. JosephFlew with American Airlines-Jan 2025
Be very vigilant about the weather both in Chicago and in Dallas. Adverse weather in either area can affect the trip.
JanieFlew with SWISS-Feb 2025
I think you should prebook food or bring your own food.
Verified travelerFlew with Spirit Airlines-Sep 2024
Make sure you get your seats booked at time of booking or at the least when you check in and make sure you check in at the earliest to have preferred seating.
MikeFlew with American Airlines-Sep 2024
Arrive early, grab a bottle of soda before getting on the plane and open it in the terminal. If you wait until flying the pressure will decarbonize the drink.
Verified travelerFlew with Alaska Airlines-Sep 2024
Not many amenities at the terminal. I would suggest grabbing anything that catches your eye before you get all the way down. There weren't a lot of Alaska flights out of Chicago, and we were at the extreme end of the terminal.
ZachFlew with American Airlines-Sep 2024
Charlotte is so crowded partially because of the tight banks American operates plus the construction and just the overall small footprint given the larger aircraft. Bring patience while transiting clt
Verified travelerFlew with British Airways-Sep 2024
Easy hop but we sure went to the most remote o’hare gate I think, prepare to walk a mile!
mauriceFlew with Iberia-Sep 2024
You should arrive early, take a lighht snack and be prepared for delays.
HeatherFlew with Lufthansa-Aug 2024
Make sure there's enough time between connections to go through customs and recheck your luggage. They will not let you proceed so you can't even try to run and catch the flight if you want to.
DianaFlew with American Airlines-Jul 2024
Be sure to have name spelled correctly. Two hours early works well.
AlexanderFlew with Spirit Airlines-May 2024
Know your connection options — specially when LaGuardia Airport (LGA) only has buses going to/from the airport to the rest of the city. Luckily, the one to the subway station (Q70) is free-of-charge to ride on!
Verified travelerFlew with United Airlines-Apr 2024
Use the find my gate feature on the flights phone app if available as the airport is a bit confusing
AyannaFlew with Spirit Airlines-May 2024
Fly out of Midway airport instead of O'Hare because its smaller and easier to manage.
PaulFlew with Alaska Airlines-Apr 2024
The flight is long, at over four hours. I would try to get a window or aisle seat to be more comfortable. I would check with other airlines that allow you to choose your seat even if you are in the economy section. I would bring your own food on the plane as the service was sometimes sketchy.
EllenFlew with United Airlines-May 2024
The flight is short enough that full beverage and snack service is limited or not offered at all. On this flight, we were offered orange juice or water. It makes sense that they can't do the full service, and doesn't bother me, but it's something to be aware of.
Verified travelerFlew with Alaska Airlines-Apr 2024
If you miss your flight ask any alaska agent to how and where to rebook the flight.
UzomaFlew with American Airlines-Jan 2024
ORD and DCA are nice airports with plenty of space. ORD is always busy so allow ample time to drive there, drop your bag, and go through security if you don't have TSA pre check.
LaurenFlew with Spirit Airlines-Feb 2024
If you can get by with a personal item, spirit has the best prices often at the best times to fly chicago to orlando for a weekend
Dr. JosephFlew with American Airlines-Jan 2024
Be prepared to walk long distances in Charlotte. Make sure your layover time is sufficient to transition between arrival and departure gates.

FAQs for booking flights from Illinois to the United States

  • How does KAYAK find such low prices on flights from Illinois to the United States?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to the United States.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to the United States?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to the United States is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to the United States?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Illinois to the United States with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to the United States?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Illinois to the United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines fly most frequently to the United States?

    Illinois and United States are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (6,618 flights per week), American Airlines (6,212 flights per week), and Air New Zealand (3,881 flights per week).

  • How many airports are there in the United States?

    There are 581 airports in the United States. The busiest airport is Hartsfield-Jackson Atlanta Airport (ATL), with 8% of all flights arriving there.

  • Which is the cheapest airport to fly into in the United States?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in the United States is Fort Lauderdale Airport (FLL), with an average flight price of $172.

  • What is the cheapest day to fly to the United States?

    Based on KAYAK data, the cheapest day to fly to the United States is Friday where round-trip tickets can be as cheap as $274. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $402 on average.

  • What is the cheapest time of day to fly to the United States?

    The cheapest time of day to fly to the United States is generally at night, when round-trip flights cost $285 on average. Morning departures are around 25% cheaper than evening flights, on average. The most expensive time of day to fly to the United States is generally in the evening, which is peak travel time and where the average cost of a ticket is $386.

  • What is the cheapest flight to the United States?

    The cheapest ticket to the United States from Illinois found in the last 5 days was to Las Vegas, at $97 round-trip. The most popular route is Bloomington (BMI) to Atlanta (ATL) and the cheapest round-trip airline ticket found on this route in the last 5 days was $114.

  • What is the cheapest month to fly from Illinois to the United States?

    The cheapest month for flights from Illinois to the United States is October, when tickets cost $177 (return) on average. On the other hand, the most expensive months are March and July, when the average cost of round-trip tickets is $225 and $225 respectively.

  • How far in advance should I book a flight from Illinois to the United States?

    To get a below average price on the flight from Illinois to the United States, you should book around 2 weeks before departure, which saves you about 33% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

  • How many cities have direct flights to the United States?

    From Illinois, there are direct flights to the United States from 10 cities. The city with the most direct flights is Chicago, with 42,651 direct flights each week.

  • How many direct flights to the United States are there each day?

    There are around 6,284 direct flights from within Illinois to the United States every day. Most flights (35%) depart in the morning.

  • How many direct flights to the United States are there each week?

    Each week there are around 43,984 direct flights from within Illinois to the United States. The most common day for departures is Sunday, with 17% of flights taking off on this day.

  • How long is the flight to the United States?

    An average nonstop flight from Illinois to the United States takes 3h 00m, covering a distance of 1089 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Nashville (BNA) with an average flight time of 1h 26m.

  • How many long-haul flights are there to the United States each week?

    Each week there are around 24 long-haul flights (6-12 hour flight duration), 4,937 medium-haul (3-6 hour flight duration) and 39,023 short-haul (up to 3 hour flight duration) flights to the United States. The most long-haul flights depart from Chicago.

  • What are the most popular destinations in the United States?

    Based on KAYAK flight searches, the most popular destination is New York (23% of total searches to the United States). The next most popular destinations are Las Vegas (7%) and Dallas (6%). Searches for flights to Orlando (5%), to Washington, D.C. (5%) and to Miami (5%) are also popular.

Reviews of the top 3 airlines serving from Illinois to the United States

 
Need help choosing which airline to fly with from Illinois to the United States? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
ContourOverall score based on 43 reviews
7.5Boarding
6.1Entertainment
7.8Crew
7.3Comfort
6.8Food
Airline reviews

You could have NOT left me and my family high and dry by not completing the reservation changes because they no longer have the contract from Phoenix AZ to Moab Utah. There wasn't even a ticket agent for Contour in Phoenix to talk to. Cost my an additional $1600. to rent a vehicle to get my family to Utah. Now I'm left with trying to have someone make it right financially. I'm not optimistic..........

2.0 MediocreBarbra, Aug 2026
Read more Contour reviews

You could have NOT left me and my family high and dry by not completing the reservation changes because they no longer have the contract from Phoenix AZ to Moab Utah. There wasn't even a ticket agent for Contour in Phoenix to talk to. Cost my an additional $1600. to rent a vehicle to get my family to Utah. Now I'm left with trying to have someone make it right financially. I'm not optimistic..........

I’ve flown Contour on 4 different flights in the last couple weeks and every one of the flights were significantly delayed. Like over 2 hours delayed. 3 of the 4 were due to maintenance and one was weather, which is beyond their control. If this continues, I will not fly them anymore. It makes me concerned that they don’t have great maintenance practices. The planes are very old and worn out and the interiors need improvement. I do like the amount of space you have between seats for legroom. They also started charging for bags recently, which I think the did when they partnered up with American Airlines as a codeshare partner. American is also a disaster of an airline so I wish they had some agreement with Delta. I am glad they offer a major airline parternership though. That is certainly giving people more opportunities. I won’t fly Contour unless they have a direct flight to where I am going. If I have to connect then I am going to take Delta. The bus at the DFW airport to get on and off the aircraft is a pain and adds so much extra time to your travel experience. I hope this is temporary while they are building a new terminal, but I don’t know.

Short flight so no entertainment and none expected or appropriate. Everyone I dealt with was professional and helpful. A good experience.

Love it. No Frills but better than Spirit No Frills. It's like a simple luxury private plane especially if you've got five or six people on it because then you probably got your own section of the plane.

All the staff were amazing! The flight was quick, everything went smoothly, I have nothing but good things to say about this flight. Thank you Contour!

It was easy, efficient from start to finish. The flight attendant was amazing. Smooth ride. It was just perfect.

We had a great experience on both of our flights! Crew was great…..the ride was smooth…and checking in was easy. We will definitely fly with them again.

Not on time. Taxied around the airport for 30 MINUTES! The pilot never said a word. Ai

My luggage is missing and contour is doing a terrible service helping finding it. Unbelievable and the worst experience ever. I would love get my money back.

It’s the only flight connecting Marion to Chicago, I do appreciate that it was available!

Terrible service - they don’t want to be there and bad food. Entertainment system in economy from the 2000s

No drink service but there was no N/A as an option to choose. Seats were extremely tight. I am under 5.5 and I bumped my knees have no idea how taller people could manage.

Flight delayed, last seat on the plane, no arrival Gate available due to the plane departing late

Kayak booked this flight with only 1h 20min layover in Chicago. This made it impossible for me and several other passengers to reach this flight. Moreover, the gate closed boarding in spite of several passengers still on their way without waiting even one more minute. However, the plane departed with 20min (!) delay, i.e., there would have been at least 15 min time to let the delayed passengers board without causing any delays. I complained and as a "thank you" the attendent booked us on the last (!) flight to Indianapolis ~7h later! Thankfully, I caught the spitefulness and the United customer line rebooked the flight to an earlier flight. Although I can't grade this particular flight since I never had a chance to take it, Kayak made the mistake of a too short layover and the crew at the gate was awful.

Flight did not have wifi service. It was experiencing technical difficulties. Definitely and old plane that needs updating.

Old 757 with poor entertainment system. United no longer partners with United for free text and email. O'Hara an absolute disaster! Limited gates clauses two hour delay. Unfortunately this appears to be the norm.

It was a good experience, unfortunately my checked baggages were come late and not arrived on time.

Very stressful to locate United Airline boarding area, delayed flight, changing boarding area again to another location with all tiredness 😩. But flying was fine.

It was hot and not as comfortable as the flight to Chicago. Must have been a different plane that needs to be worked on or replaced.

The SFO lounge closes at 12 midnight. My flight took off at 2AM

AA was fine....the overall experience was subpar, but not due to the airline due to broader issues

No ground air conditioner for the plane. Very hot and humid prior to take off which was an uncomfortable period of time.

Check-in process was poor, very poor, only one person to check-in all passengers, so if one passenger had a check-in issue, all other passengers were delayed. All check-ins should have two airline staff to check-in passengers.

The flight up was great no issues. The flight back home was a cluster. I was told the plane I was waiting on was giving to another flight which caused me to miss my connection flight. Granted the airline did great with getting hotel and vouchr for food.

Flight was delayed and so much of inconvenience related to the gate change.

Nothing was good about this flight. Although the flight actually departed more than 3 hours late, due to “air traffic control management” we pushed back from gate 2 hours and 20 minutes late and proceeded to sit 100 yards from gate for and then n tarmac for another 1/2 hour additional 20 minutes

One thing you can always count on is your AA flight getting delayed. This is not surprising when they operate these planes like a greyhound bus with wings.

The seats cushion on my seat (exit row) needs to be replaced. It felt like I was sitting on a bar rather than a seat cushion. Also, I was in the middle seat and I sat next to an oversized guy (window seat) and he took up about 25% of my space. Otherwise, the experience was good. :)

The flight was delayed by about an hour due to a maintenance issue which later then required a change of planes. The crew was great and friendly. The in-flight entertainment did not play properly on Apple Vision Pro in a Safari browser. Although the movie trailers would play fine, the actual movies themselves just had a black screen with audio. There must be something with copy protection or something that isn’t compatible with the Safari browser on Apple Vision Pro. The free inflight Wi-Fi for American Airlines Advantage members is a nice bonus. and is great that they aren’t charging extra for things that have become basic utilities in 2026, like internet access.

Good flight, regional jet so old and seats could use an upgrade

More options for your flight to the United States

Complete your trip to the United States with a hotel stay or car rental