Find cheap flights from Islip to Illinois

Find cheap flights from Islip to Illinois

Round-trip
Economy
Islip (ISP)
Illinois
Wed 11/25
Wed 12/2
Any month
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Good to know

Low season

May Best time to beat the crowds with an average 10% drop in price.

High season

September Most popular time to fly with an average 32% increase in price.

Average price round-trip

$505 (avg. price over the last 2 weeks)

Good deal round-trip

$164 or less

Good deal one-way

$153 or less

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Islip to Illinois for the following prices or less: to Chicago $153 one-way - $179 round-trip
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be January, November and December. The cheapest month to fly to Illinois is August.
  • Morning departure is around 7% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs - booking Illinois flights

How long is the flight to Illinois from Islip?

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Top airlines flying Islip Long Island to Illinois

Scores according to KAYAK customer reviews

7.2
American Airlines
Overall score based on 44,870 reviews
7.5
Boarding
7.1
Comfort
7.8
Crew
6.8
Entertainment
6.7
Food
Airline reviews

Pros: "Nothing good to say about AA"
Cons: "AA screwed up reservations by rescheduling flights by 3 hours earlier (done not once but two times) causing 6 hour layover. This plus an additional 2:38 delay on next flight made the journey horrible. Will never book an AA/BA flight again for intrnational travel."

Pros: "All crew very friendly & helpful. Went out of their way to help elderly gentleman traveling alone"

Pros: "The flight was on time, cabin crew looked nice and professional, AA stuff at the airport of departure was very helpful with complicated check-in procedure."
Cons: "It was a short flight (less than an hour) and only complimentary drinks were offered, no little snacks (like pretzels, peanuts or cookies)."

Pros: "Nothing"
Cons: "More than 24 passengers on the flight from LAX to Chicago lost their connection to Venice After we landed in Chicago with 2 hours delays we all run to catch our flight to Venice and we got there 5 minutes after the flight was supposed to leave but was still there instead but we were denied access and send back to customer service"

Pros: "British Airways seats"
Cons: "If we did not arrive at the airport 3hours ahead, and get on an earlier flight we would have missed our connecting flight to England. Do Not book such shoes time between flights because often they are delayed."

Cons: "3 hours late leaving Dublin, with poor communicstion on the monitors as to gate info. not to mention the lateness."

Pros: "nothing"
Cons: "Flight crew was an hour late to the flight, whereas customers were waiting for far longer than that."

Cons: "3 boarding doors less than 50 feet apart with departures leaving within 15 min of each other created a difficult to penetrate gaggle."

Pros: "There is not much to like when you over charge for seats and have staff who don’t accomodate for family to sit together or someone with a disability who needs to use the restroom often to sit on an aisle seat."
Cons: "Staff has horrible attitude. Price for seats and luggage is ridiculous."

Pros: "Flights reached the destination before scheduled arrival"
Cons: "Chicago airport is a mess. It took us about 3 hours from exiting international terminal to domestic We managed to board a flight just before the gate close. Literally running in the airport. I believe there are people who missed the flight"

Pros: "Great entertanment system and nice complimentary drinks including liqour."
Cons: "Seats a little cramped in coach"

Pros: "Best landing I’ve experienced recently!"

Pros: "the Bowing 787 was wonderful"
Cons: "flight had been delay and delay. we are very disappoint because we always think we are fly with British airway, we even went to check in counter of British airway but find out America airline are the solo airline.you guys can't advertized like that."

Pros: "The flight was great. Lots of movies to choose from. Food was pretty good too."
Cons: "They moved our flight around multiple times. We first had a layover in Chicago then through multiple emails and one phone call they just flew us straight to London with no layover. It all worked out it was just stressful not knowing exactly when we were flying out and if we were going to make our connecting flights. It did work out and we did make it."

Pros: "I made it"
Cons: "I had to run for all its worth."

Pros: "Smootm and in early."
Cons: "Not knowing no gratis drinks were served."

Cons: "Flight delays and cancellations."

Pros: "I got there on time and they didn't lose my luggage."
Cons: "The planes are too cramped, costs are too high, staff just love pointing out a carry on isn't a carry on even though it's sold as one and fits in every other airline's definition of one. Boarding process is ridiculous."

Cons: "Legroom was a bit cramped for a tall person"

Cons: "Bought 2 tickets but seats weren’t together poor service"

Cons: "charged a surprise of $175 for my third bag although Kayak mentioned i should be charged $75 at the time of booking. AA says it is due to Jordanyan Airlines, why was I surprised by this extra charge?!"

Pros: "Should have booked AA instead of BA."
Cons: "AA couldn't find BA reservation. poor integration of services"

Pros: "Flight was on-time and crew was pleasant. This flight had movies available to watch!"

Pros: "Nothing"
Cons: "Our bags were lost going to Rome for a wedding and our cloths were in the bags for the brides father and sister bridesmade. No updates and the have my phone number and email address. You would think it was 1968 or something! Unacceptable in this day and age of communication! The wedding is in 48 hours and can’t find our bags? All this was explained to the airline in Rome the baggage handlers etc. etc. still nothing. Absolutely amazing and disappointing!"

Pros: "Great service."

Pros: "Fast reliable two thumbs up!!!"

Pros: "One cabin crew went the extra mile for me...rescued a partial dental plate which I had inadvertently tossed in the trash."

Pros: "Good and entertainment"
Cons: "I have short legs so the long flight was uncomfortable. A stop of some sort would helpnif offered"

Pros: "The helpful steward"
Cons: "The bumpy ride"

Pros: "excellent flight. on time and no issues"

Pros: "Nothing!"
Cons: "Although an email was received 3 hours before departure that everything was on schedule, we were told when checking in our whole itinerary had been changed to leave the next day. We had not been contacted and we missed our daughter’s professional basketball game in France. This was the reason we bought the tickets from Kayak to begin with. The cancellations were happening with British Airlines and they were not working with American Airlines to help us out to get to the game on time."

Pros: "Staff and Entertainment"
Cons: "Back row, but someone has to sit there :)"

Pros: "fairly comfortable, crew was helpful"
Cons: "Having to use my phone for entertainment, with no place to plug it in"

Cons: "A passenger caused a delay in security, and as I'm rushing for the gate, the agent closed the door and told me I couldn't board. She then marked me as a no-show, while she was standing right next front of her. I had to spend the next 4 hrs on the phone, trying to get my tickets sorted out. Then, upon arriving at Heathrow,... No luggage. They told me it was still in Chicago. Upon finally receiving my bags, I find them full of sawdust and sand, and several items damaged. I will NEVER fly American Airlines again, and I will highly recommend to my friends and family to avoid them like them plague. Horrible service! Nothing but a run-around and not once did the agents apologise, even after admitting that my problems on this journey were due to a mistake made by one of their agents."

Pros: "There was nothing too bad other than I wasn't able to check in online bc our first leg of the flight was operated by American Airlines. But there wasn't anything that really stood out that would make me want to fly them again other than it was the best price."

Pros: "The crew was very helpful at each stop even though they weren't responsible for the disasters."
Cons: "Initially we thought we were flying with British Airways. We then had to do some digging to realize it was all out of American Airlines. Then we couldn't get proper boarding passes and luggage tags until one of the crew members spent a significant amount of time untangling each leg of our trip so they were in the proper order. We got delayed by 4 hours in Chicago and missed our connection in Manchester. We had another 5 hour wait there. By the time we got to Dublin, our bags didn't also arrive. After almost 24 hours of travel, we arrived but without all of our stuff."

Pros: "Very friendly staff, on time, most of all very comfortable."
Cons: "The Oppurtunity that could improve is the boarding in plane to have passengers board in groups."

Pros: "They were absolutely fantastic on checking on me, food, service, flight in general. Would recommend to anyone!!!"

Pros: "Easy flight, friendly crew."
Cons: "Girl next to me being sick the whole time"

Pros: "I like the comfortable chairs and screen touch screen in the seat in front of me"

Pros: "JAL is customer oriented and it's always a pleasant experience. Unfortunately, though the return trip is also JAL, the cabin crew isn't."

Cons: "The flight was delayed for 2 hours and after seated in the AA plane for 2 hours, the flight was canceled because without pilot?! Changed to a UA plane but after seated in the UA plane 1 hour, the plane needed to be maintenanced. Had been changed to another UA plane. After three times into three planes, arrived Chicago at 3:30am without the checked baggage."

Pros: "Comfort"
Cons: "Nothing at all"

Pros: "our original flight was cancel due to snow, and we were placed at a hotel and food vouchers were given as well"
Cons: "no head set were passed out making video entertainment useless"

Pros: "Almost half empty cabin made this a very pleasant flight!"
Cons: "Food on AA was mediocre as usual. Edamame salad was nice and fresh for a change. Desserts are now prepackaged wrapping similar to candy bar..."

Pros: "Nothing"
Cons: "That it got cancelled"

Pros: "It's a good flight but the crew in Mexico City is really bad"
Cons: "Good flight experience, but the front desk in Mexico they are really mean. I request to talk with the manager to give me solutions but the manager was the worst. The manager show lack of experience and he was unable to give me solutions. He give me more problems than good news."

Pros: "Flight was fine"

Cons: "When I arrived at CMI no ticket was issued for my second leg, so I could not use the internal transit bus to at Terminal 5 at ORD ("for ticketed passengers only). I had to exit use the external train (which was delayed) and go through the very slow Terminal 5 security. Almost missed my ORD-LHR flight (arrived at the gate after the official closing time)"

Pros: "I liked that the gave us food vouchers for our wait"
Cons: "That I really wanted to get home. One person missed is brother’s funeral, another person missed their connecting flight. I thought it was poor planning on frontiers part. Many people were getting very upset with the crew and calling customer service. I felt very bad feeling f the crew and many people who needed to be in Chicago when they promised for us to get there. It was upsetting, just tried to make lemonade out of lemons."

Pros: "Flight was on time. All but one crew member were pleasant and professional. Low cost initial fare, but..."
Cons: "Relatively short flight made absence of beverage and food/snack sufferable (without paying high end bar prices for for snack or drink). Paid for reasonable leg room, carry-ons and a checked bag. So, after all those fees, flight cost was average."

Pros: "Service was fast and friendly and very efficient!!"

Cons: "Everything was fine other than how cold it was on the plane. The coldness actually woke me up several times because it was so bad."

Cons: "When I got to the gate, I was told that I had to pay $45 for my carry on luggage, which I found it to be somewhat insulting (if I had agreed to check-in the luggage it would have been 'cheaper' only $40). This was the first time I had ever been asked to pay for my carry-on luggage, and the basis for me to never fly Frontier ever again. They claim that it was because of the ticket I purchased through a third party, and I told them that they should not advertise any tickets where you intend to charge people for their carry-on luggage. To make things worse, it appears that Frontier does not participate with the TSA pre-check program, and even though I had my global entry card with me, the officer at TSA pre-check would not allow me through this line because of the airline I was flying with - Never again!!! I suspect that on my way back I'll be forced to pay another $45 for my carry-on luggage, which I despise."

Cons: "Very uncomfortable seats, they did not recline. Crew kept talking loudly at the back and it was hard to sleep ."

Pros: "The low price of the fare"
Cons: "1. All the added charges even for a refreshment 2. The obnoxiously loud noises coming from the plane mechanics 3. A group of 5 that were drunk, belligerent, loud, and inappropriate 4. Lack of cleanliness (old tissues & trash stuffed in the seat pocket, trash on the floor, looked like throw up in our aisle-our entire aisle asked to move seats) 5. Stewardess speakerphone so loud It was painful"

Cons: "Had to pay for carry on and water. What a joke!! A unruly child was screaming and pounding on the back of my seat and there were open seats up front so I ask a attendant if I could move up. The attendant told me according to FFA regulations I needed to stay in my seat. I FOUND OUT LATER WHAT SHE TOLD ME IS TOTAL BS!!!!! Never again Frontier!!!!"

Pros: "The crew was professional."
Cons: "The seats are not comfortable so it makes it difficult to sleep. Ours was a red-eye so that was not good."

Cons: "I arrived later than anticipated, flight was delayed and was late for a work meeting"

Pros: "The crew was better than expected."
Cons: "Have to pay to select a seat?? Carry on is $40. Checked is $35. No Skycap. I won't be flying Frontier in the future unless they decide to go to Southwest management school."

Pros: "Flight attendants and gate personnel were very gracious. Nice flight (weather cooperated) and no delays."
Cons: "Desk personnel at ORD were horrible, very abrupt, and just plain angry. Everyone has a bad day, but I'm easy to deal with and the only thing I did was step one foot over the "wait" line to the counter. I apologized after you snapped at me and continued to smile... while you continued to frown and be condescending. That alone means I don't fly your airline again. I can afford the extra for Delta and I should have stayed there. Seats were really uncomfortable and though we paid extra for the better seats, leg room was at a minimum. Again, about what I expected. All told, for 1 bag and a little more legroom, we paid an extra $115 per tick. Not really any savings over a more full-service airline."

Cons: "Uncomfortable chairs,"

Pros: "Flight left early, and arrived about 45 mins early, no problems on the flight, friendly staff, excellent price, very happy customer!"

Pros: "Smooth effective boarding to the plane."
Cons: "Seats were like the park bench, hard as rock. By the time we landed I had a sore back and neck. I don't think cabin was pressurized properly or there was something not right as my Airpop during landing was much more savior than I have even had and was very painful. his was first and will be last flight with them. Not worth the $30/$40 saving you make."

Pros: "worsts seats ever. unknown $ 40-45 to check a bag. Will never fly again.. if southwest is a 7/10, you are a 2"

Pros: "The flight cost was cheap, but was never informed that carrying on a bag I would have to pay for it. Wasn't aware that I would also be charged for selecting my seat. Beverages, including water, and food were also not included in the cost, and were relatively expensive. I used the app to check in 24 hours before my flight. I arrived at the airport and wanted to double check that I was checked in for my flight because I felt uneasy about it. The women at the check in said the mobile app does not count as a boarding pass and etc. So I needed to wait to be checked in. While getting in line to board the plane, a couple infront of me had their boarding passes on their phones and had no problem boarding with the app. I think there was a little miscommunication with the app and workers."

Pros: "The crew was nice."
Cons: "Although the flight was good I was shocked that I had to pay an additional fee for my seat upon check-in via the internet. I had to pay $17 extra on the way to Florida and $11 extra per seat on the return flight to Chicago. Why wasn't I made aware of this? Also, I went on Frontiers website prior to my trip to see what the carry-on fees were. They never explained the fees until after I was trying to print out my boarding pass and I was charged $40 per carry-on (3 of us were travelling). Give a head's up about your fees!!!!!! Otherwise, your prices are misleading!"

Pros: "nothing"
Cons: "left at the airport in milwaukee on 12-28-15 had to fine my way back to ohare at my expense, without luggage, poor service, still wating for luggage"

Cons: "Frontier airlines is the worst airline."

Cons: "$45 to check my carry on. Just give me the bottom line when you charge me instead of saying I am getting a deal than charging me even more once I carry my own bag onto your plane."

Cons: "Absolutely horrible, your accommodations for a cancelled flight were a joke. Pretty much a good luck getting home we can get you to your destination 6 days later if you are willing to wait."

Pros: "Flight was on time and we got to our destination ok."
Cons: "No food and had to pay for drinks, seats and anything beyond the price of the ticket."

Pros: "Good price for ticket. Plane boarded quickly and left and arrived on time."
Cons: "Frontier "nickle dimes" you to death. Charge for seat, charge for luggage, charge for something to drink. Add it all up and I'm not sure it is any cheaper."

Pros: "On time for departing and arrival. No frills but felt comfortable."
Cons: "The baggage fee is not included in ticket prices."

Cons: "Unnecessary delays about 1.5hrs waiting on tarmac without reasonable explanation."

Cons: "Great experience but for the exorbitant bag check rates"

Pros: "Nice seats"
Cons: "It's silly to pay so much for a carry on, but the flight was so cheap."

Pros: "The worst flight I have ever had. Most uncomfortable seats I've ever sat in. I will never ever fly this airline again. They also charge for everything. Everything had a fee. Horrible experience. I guess AA is the best."

Cons: ""Upgraded" to the most uncomfortable seat I've ever flown in. Expensive checked and carry on. Flight attendants were all extremely rude and unprofessional - spent the entire flight ignoring the passengers and clustered at the front of the plane complaining about coworkers. The flight attendants were doing much of their work by flashlight - seemed very substandard. No welcome. No goodbyes. It was clear that they had disdain for the clients. No food or beverage service. Will never consider Frontier again."

Pros: "Flight left on time and arrived a little early. Staff always offering seatbelt status in a prompt manner, keeping our safety in mind."
Cons: "Hard to get any sleep in a cramped space, but that's how it usually is on a redeye."

Cons: "landing and waiting for a gate for 45 minutes. We were an on-time arrival without a gate? That is very poor planning and anticipation of flight needs."

Cons: "Paying for a carry on bag. It was very expensive. I will not fly frontier again."

Pros: "The crew treats you better than crews on more expensive airlines, and they have a great sense of humor. You can tell that positivity and how they interact with passengers is a priority in the hiring and training process. A lot of people have complained about having to pay extra for carry-ons and other luggage, but Frontier is REALLY clear about their policy for baggage when you book, so these people shouldn't have been shocked. It is a great deal for people who only travel with one small bag, and I'm glad that there is an airline that offers such cheap flights for light travelers. If you need to take a lot of luggage, you can add the cost as you are booking and then decide if it's the best deal before you finalize payment. Overall, it was a very good experience. You aren't going to get a ton of extras for free on this airline, but if getting to point B from point A with a nice flight crew is all that matters to you, Frontier is a great deal."

Pros: "The crew on my return flight was much more personable than on the flight out. Boarding and unboarding were super easy (no checked baggage for my flight)."
Cons: "THE HIDDEN FEES ARE CRAZY RIDICULOUS! Sure the flight starts out cheap, until you realize you have to pay for carry-on bags, and another fee when you pick your seat! Overall my flight cost was $130 more than anticipated with the hidden fees. The seats on the flight to my destination were old and uncomfortable and my seat did not recline (and I paid $30 for the super stretch seating)."

Cons: "Flight was delayed 3 hrs due to a mechanical problem"

Pros: "Nothing stood out to like."
Cons: "The flight attendent had a hard time explaining things over the loud speaker. To high on in cabin food."

Pros: "Easy boarding, knowledgeable staff...friendly service"

Pros: "Amazing service. Kat and Linda from MIA airport check in were phenomenal and completely made my trip in every way possible. I hope frontier recognizes how truly lucky they are to have these women on their payroll."

Pros: "Price"
Cons: "$1:99 soda realy"

Pros: "Overall good experience. Flight got in early but then had to wait for gate to clear."

Pros: "First of all they charge you 40$ in internet for your carry on bag ! You dont have food or snacks Its cheap only If you dont have any bags otherwise take an other airline !"

Cons: "Over 1.5 hr delay in Las Vegas- sometime cannot be helped, I understand."

Cons: "I spent the entire day in the airport b/c they strung us along 2 hours at time. Then when the plane was finally ready they had to get a new staff for the plane and delayed us another 4 hours. Couldn't they have planned ahead and found a staff before the plane was ready?!? Or if they had just told us upfront the repair was going to take 8-12 hours we could have made use of our day. Losing a whole day of productivity when you own a small business is catastrophic. Frontier really screwed me over."

Cons: "the seats"

Pros: "Nothing"
Cons: "Everything"

Pros: "The crew was fine."
Cons: "They charge for everything, is a scam . I will never book a flight w them."

Pros: "Notification emails about delay and new departure time"
Cons: "- late departure - we spent 45 mins in plane after landing at Chicago airport and it was not fun - not a variety of food to buy options"

Pros: "Price early arrival"

Cons: "Apparently the seats are "pre-reclined". What a joke! My gf and I now call this Frontier Airplanes, because this can't be an airline."

Read more about American Airlines

Book cheap flights from Islip Long Island to Illinois

Recent round-trip flight deals

12/19
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