Find cheap flights from Illinois to the United States from $49
This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight departing on 11/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.Round-trip
1 adult
Economy
Sun 7/2
Sun 7/9
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Good to know
Low season | January |
|---|---|
High season | June |
Cheapest flight | $49 |
Average price round-trip | $408 |
Good deal round-trip | $98 |
Good deal one-way | $59 |
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 21% increase in price.
Flight from Chicago O'Hare Airport to Boston
(avg. price over the last 2 weeks)
or less
or less
FAQs for booking flights from Illinois to the United States
Top 5 airlines serving from Illinois to the United States
Scores according to KAYAK customer reviews8.3
Alaska AirlinesOverall score based on 29427 reviews
79entertainment
79food
88crew
83comfort
85overall
85boarding
Airline reviews
Pros: "Timing of the flight was always good. Efficient flying. Crew was super helpful too even when passengers were a bit too much."
Pros: "Timing of the flight was always good. Efficient flying. Crew was super helpful too even when passengers were a bit too much."
Pros: "The attendant at the gate was great about getting me a seat assignment next to the other person in my group. The food options on the flight are much better than I expected for airplane food."
Cons: "No complaints, really."
Pros: "The crew did very well. The seats could have been a little more comfortable, the lumbar could have been a bit more stiff for lower back support, the arm rest up and down function did not work, and a little more space between rows and seats would have made it more comfortable."
Cons: "The seats could have been a little more comfortable, the lumbar could have been a bit more stiff for lower back support, the arm rest up and down function did not work, and a little more space between rows and seats would have made it more comfortable. The bathroom was too narrow."
Pros: "The Crew from check in to flight was amazing! Service with a Big huge smile."
Cons: "Nothing to dislike."
Cons: "Delayed. Flue season folks. If your sick just don’t travel!"
Pros: "Leg room seems a bit more spacious than other flights. Very comfortable. Nice experience."
Pros: "Nothing."
Cons: "We were sitting in the plane on the tarmac for 3 hours waiting to take off. The crew did a very poor job announcing what was going on."
Pros: "Alaska airlines much better than United or American in terms of friendly service, wifi and battery charge, and entertainment options"
Pros: "Crew was friendly, attentive, and informed us of any delays going on. Great experience!"
Cons: "The flight attendant went on and on and ON about how turbulent air was reported ahead, just because we're in a smooth stretch doesn't mean we're out of it yet, and so on. Must have been every 10-20 minutes. She just would not stop talking; while her voice was fine in person, over the PA it sounded like a cheese grater taken to my inner ear. I barely slept that flight; it was miserable."
Cons: "The seats were awful and uncomfortable. Payed 100 dollars extra for even more leg room and barely had any. Such an old plane for such a long flight. The seats in the first row barely fit a female with hips. The in-flight entertainment was staticky and you could barely see the TVs. Overall, one of the worst flights I have taken on JetBlue."
Pros: "Complimentary snacks and drinks."
Cons: "Broken seat back, broken tray table, audio input didn't work."
Pros: "The available movies were pretty good."
Cons: "The crew member serving the food was way too slow."
Cons: "Flight was 3 1/2 hours delayed. In-flight entertainment system didn’t function. They didn’t perform a beverage/snack service. Very poor overall. Disappointing."
Pros: "Cleo, our fly attendees made us feel right at home!"
Pros: "Seats are comfortable, main reason I like this airline. Crew was nice."
Cons: "The screens on the back of the seats are showing their age and the controls on the armrests are causing your neighbor to change your channel or the brightness of the screen. Letting everyone stream content to their own devices would probably be a better option, with safe charging available."
Cons: "Our flight was delayed 4 times. We then sat on the runway for an extra 45 minutes because someone’s tv did not work. We missed our set transportation which was already rescheduled 4 times and had to pay $150 Uber to get home"
Cons: "They had to reset entertainment sets 3 times before they started working. This happens regularly on the SFO to BOS jetblue flight."
Pros: "crew was friendly enough, provided the bare minimum of service"
Cons: "running water in the bathrooms hot coffee and tea"
Pros: "There was actual room for my legs."
Cons: "There could have been more legroom so that you could actually get out without almost sitting in someone else's lap. But it was easier than my last flight (on American Airlines). Having a meal available would have been nice on a flight of almost 6 hours."
Pros: "Kosher snacks! Thank you. Screens and outlets at every seat. Safe, controlled Covid protocols including de-boarding. Excellent!"
Pros: "Delta flight took extra precaution to keep all passengers safe before during and after the flight. They communicate effectively during the flight. I will be flying Delta again and again."
Cons: "The trip was great"
Pros: "The crew’s positive energy and great service were truly amazing. Kudos Delta!"
Cons: "We arrived around 39 minutes early and the whole process was very smooth"
Pros: "When I asked for a seat change the crew was very accommodating"
Cons: "With covid in Seattle I was placed next to a restroom. I did not see any bathroom sanitation occurring during the flight, and no sanitizer available anywhere."
Pros: "Super friendly and helpful with connections."
Cons: "The music on the plane was a bit much. Lol"
Cons: "Turn on the lights before landing graduallyb- noone likes bright fast - too nasty;"
Pros: "Nothing"
Cons: "We were traveling international in Twitter after contacting we were told we can carry one checked baggage but then we were not allowed and at gate they didn’t know the procedure and repeatedly checked our passport Poor customer service"
Cons: "Made us check our carry ons and there was plenty of space in the cabin overhead comoartments"
Pros: "Flight was good and crew were good. Nothing very outstanding but by no means a terrible flight."
Cons: "The in flight screens weren't working well."
Pros: "The flight got delayed and than it was also late"
Cons: "Be on time"
Pros: "When I checked in for my flight I was given another passenger’s ticket (very similar name) and my checked bag was then sent to this other flight destination. when I got to my gate (correct destination) I discovered the error. The gate crew worked hard to get my checked bag off the wrong flight and rerouted to my flight within 20 minutes of my flight’s departure."
Pros: "Onboarding was easy and smooth. The plane was clean and the seats were comfortable. WiFi easily connected, too. Much better than expected for a budget airline."
Cons: "Nothing."
Pros: "it was a direct flight"
Cons: "allowing to check bags in late. didn’t allow us to & made us take our bags thru TSA. We told them that we had liquids in there & would need to check them in at the kiosk bc tsa would throw them away. They said “it’s okay, just let tsa know we said it was ok” tsa threw our stuff away & lost a lot of"
Pros: "Check in was easy and quick"
Cons: "Plane could have been cleaner. Price is ok, but not as good as it seems once you add luggage."
Cons: "I missed the flight because they did not allow online check in. The check in closed 45 min before the flight and I got to the airport 35 min before the flight because my first flight at LGA was cancelled and I had to spend $250 to uber yo EWR. They charged me $200 and only refunded me vouchers"
Cons: "We were unable to check in with SunCountry .. very frustrating!"
Pros: "Crew was great!"
Cons: "I didn’t realize I had to pay for a carry on"
Pros: "The crew was absolutely wonderful And seat was the most comfortable ever"
Pros: "The upgraded seats were worth it."
Cons: "Everything else. Had me listen as wrong gender. Had to pay extra to fix it. Couldn’t get checked in early. Spent 30 minutes with the agent to get a ticket, went to gate and was told I need to show a receipt because they don’t have record of me paying for the seat. Will not fly sun country again"
it was a nightmare of a trip. multiple delays, dirty bathrooms, long wait in tarmac, ran out of fuel diverting flight. on and all over 4 hour delay!
Cons: "The Terminal in Chicago had no open amenities and overcrowded."
Pros: "Despite the poor rating because of the mechanical issue, I will say the pilots did a fantastic job with some pretty choppy air conditions."
Cons: "Flight was delayed almost an hour while we were already on the plane. Minor mechanical issue that could’ve been handled at destination. The seat was super uncomfortable and I would’ve appreciated at least some more from the crew, like maybe even a bottle of water or something."
Cons: "Leave a seat empty in the middle could be good for social distancing"
Pros: "The crew was nice"
Cons: "There was maintenance happening on the plane after everyone boarded. It was a long wait on the plane and it could have been better if that was done before boarding."
Pros: "Smooth price getting boarding pass and we were anytime sit together"
Cons: "All good"
Pros: "Yes! They were helpful and nice as well on the flight."
Cons: "Mhm.. Nothing."
Pros: "AA is always a good time:) I loved the crew, the complimentary service and the comfort"
Cons: "Nothing"
Pros: "good luggage space overhead - accommodate wheelie vertically like books. each seat had indiv tv screen, recent movies, usb charger, 3 prong charger."
Pros: "There is nothing positive to say besides it got me where I needed to go, even though my first flight was cancelled and had to completely redirect to another airport an that took me 2 hours to get to."
Cons: "Everything, the staff was rude especially at the gate. I was forced to check my bag not because of size but because I was in Group 6 boarding and I got on there was plenty of room on the plane. I had even explained I needed to do work and would have to hold everything in my arms."
Book cheap flights from Illinois to the United States
Recent round-trip flight deals
6/20Tue
1 stopSpirit Airlines
5h 48mORD-FLL
6/21Wed
1 stopSpirit Airlines
5h 02mFLL-ORD
$99
6/29Thu
nonstopSpirit Airlines
2h 28mORD-DFW
7/11Tue
nonstopSpirit Airlines
2h 32mDFW-ORD
$102
6/22Thu
1 stopSpirit Airlines
9h 13mORD-DFW
7/11Tue
nonstopSpirit Airlines
2h 32mDFW-ORD
$105
8/22Tue
nonstopDelta
2h 14mORD-LGA
8/29Tue
nonstopDelta
2h 41mLGA-ORD
$106
6/22Thu
nonstopSpirit Airlines
2h 28mORD-DFW
7/3Mon
nonstopSpirit Airlines
2h 36mDFW-ORD
$108
6/22Thu
1 stopSpirit Airlines
9h 13mORD-DFW
7/3Mon
nonstopSpirit Airlines
2h 32mDFW-ORD
$110
6/21Wed
nonstopSpirit Airlines
2h 28mORD-DFW
6/26Mon
nonstopSpirit Airlines
2h 32mDFW-ORD
$111
6/20Tue
1 stopMultiple Airlines
8h 17mORD-FLL
6/24Sat
nonstopMultiple Airlines
3h 16mFLL-ORD
$121
6/17Sat
1 stopMultiple Airlines
25h 10mORD-FLL
6/21Wed
1 stopMultiple Airlines
5h 02mFLL-ORD
$130
8/8Tue
nonstopDelta
2h 20mORD-LGA
8/15Tue
nonstopDelta
2h 41mLGA-ORD
$132
6/21Wed
nonstopMultiple Airlines
3h 08mORD-FLL
6/28Wed
1 stopMultiple Airlines
25h 25mFLL-ORD
$132
6/13Tue
1 stopFrontier
18h 19mORD-FLL
6/20Tue
1 stopFrontier
26h 40mFLL-ORD
$133
6/17Sat
nonstopMultiple Airlines
3h 08mORD-FLL
6/20Tue
1 stopMultiple Airlines
26h 40mFLL-ORD
$135
8/22Tue
1 stopUnited Airlines
4h 15mORD-LGA
8/29Tue
nonstopUnited Airlines
2h 37mLGA-ORD
$142
9/26Tue
nonstopUnited Airlines
4h 38mORD-SEA
10/4Wed
nonstopUnited Airlines
3h 56mSEA-ORD
$148
10/12Thu
1 stopUnited Airlines
6h 23mORD-EWR
10/14Sat
nonstopUnited Airlines
2h 37mEWR-ORD
$151
8/17Thu
nonstopJetBlue
2h 16mORD-JFK
8/21Mon
nonstopJetBlue
2h 38mJFK-ORD
$166
9/12Tue
nonstopAmerican Airlines
2h 09mORD-LGA
9/14Thu
nonstopAmerican Airlines
2h 34mLGA-ORD
$168
10/1Sun
1 stopUndisclosed Carrier
3h 54mORD-EWR
10/3Tue
nonstopUndisclosed Carrier
2h 34mEWR-ORD
$175
9/3Sun
nonstopAlaska Airlines
4h 32mORD-SEA
9/3Sun
nonstopAlaska Airlines
3h 52mSEA-ORD
$193
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Recent one-way flight deals
11/15Wed
nonstopDelta
2h 32mORD-BOS
$49
6/20Tue
1 stopSpirit Airlines
5h 48mORD-FLL
$50
6/29Thu
nonstopSpirit Airlines
2h 30mORD-DFW
$51
8/15Tue
nonstopDelta
2h 05mORD-LGA
$53
6/22Thu
1 stopSpirit Airlines
9h 13mORD-DFW
$54
6/21Wed
1 stopFrontier
25h 10mORD-FLL
$58
8/2Wed
1 stopJetBlue
4h 20mORD-BOS
$59
6/13Tue
nonstopSpirit Airlines
2h 28mORD-DFW
$59
6/26Mon
1 stopFrontier
25h 10mORD-FLL
$65
6/27Tue
1 stopMultiple Airlines
8h 11mORD-FLL
$66
7/10Mon
1 stopFrontier
18h 25mORD-FLL
$67
7/26Wed
1 stopMultiple Airlines
8h 17mORD-FLL
$68
7/12Wed
1 stopMultiple Airlines
8h 17mORD-FLL
$69
8/2Wed
nonstopJetBlue
2h 32mORD-BOS
$74
10/17Tue
nonstopDelta
4h 47mORD-SEA
$74
9/13Wed
nonstopUnited Airlines
2h 14mORD-EWR
$79
11/8Wed
nonstopUnited Airlines
2h 11mORD-EWR
$83
10/26Thu
nonstopAmerican Airlines
2h 03mORD-EWR
$84
9/17Sun
1 stopSun Country Air
15h 43mORD-LAS
$107
7/3Mon
nonstopAlaska Airlines
4h 34mORD-SEA
$113
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