Find cheap flights from London to Illinois

Find cheap flights from London to Illinois

Search hundreds of travel sites at once for deals on flights to Illinois

Round-trip
Economy
London (LON)
Illinois
Thu 7/29
Thu 8/5
Any month
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Good to know

Low season

OctoberBest time to beat the crowds with an average 6% drop in price.

High season

AugustMost popular time to fly with an average 25% increase in price.

Average price round-trip

$764(avg. price over the last 2 weeks)

Good deal round-trip

$407or less

Good deal one-way

$330or less

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from London to Illinois for the following prices or less: to Chicago $316 one-way - $400 round-trip
  • High season is considered to be January, February and December. The cheapest month to fly to Illinois is January.
  • Morning departure is around 35% 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

Which airlines have a flexible cancellation policy for flights from London to Illinois due to COVID-19?

How long is the flight to Illinois from London?

What is the cheapest flight to Illinois from London?

Which airlines fly to Illinois?

Can I fly to Illinois? Are there any travel restrictions when entering Illinois?

Can I fly to Illinois without having to quarantine on arrival?

Do I need to take a coronavirus (Covid-19) test before flying to Illinois?

What documents do I need to fly to Illinois?

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How does KAYAK find such low prices on flights to Illinois?

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What is the Hacker Fare option on flights to Illinois?

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

Top airline flying from London to Illinois

Scores according to KAYAK customer reviews

7.2
TAP AIR PORTUGAL
Overall score based on 5,373 reviews
7.2
Boarding
7.2
Comfort
7.9
Crew
6.6
Entertainment
6.9
Food
Airline reviews

Pros: "Flight was on time. Seats were comfortable. Plenty of food was included in the flight. And service was good."
Cons: "Greater weight allowance for carry-on luggage."

Pros: "Great customer service!"
Cons: "NA"

Pros: "nothing - they misinformed me left and right so I couldnt make properly informed decisions and then denied me boarding and told me to pay for a new flight after having spent over 750 and 3 days 2 nights at the airport due to the mishaps."
Cons: "staff that gives the correct information so u can properly plan for the check in and boarding procedures and compassion to advocate to let me onto the flight they made me jump thru hoops just to get onto."

Pros: "It was Okay"
Cons: "I m disappointed with the online deal I have booked my self with two checked bags & paid extra for that but I had to pay £ 80/-"

Pros: "Comfort and cleanliness of flight."
Cons: "Both flights did not have any general vegetarian options in snack or main courses. There was no option online to submit a meal request and as booking last minute travel and in a foreign country, it was not possible to contact Air Portugal via phone. If the flight offers snack and two meal options, at least one should be vegetarian to accommodate this common population of passengers."

Cons: "Super uncomfortable seats (the most ever) No personal tv/entertainment."

Pros: "Crew was great and seats had footrests."
Cons: "Very old plane with outdated entertainment system and no power outlets. Had to take bus to plane, we repeatedly lined up for boarding only to have our flight delayed again and again."

Cons: "My wife and I paid for a better seat, (online) but when we boarded they told us that was impossible. They kept our money !!!"

Pros: "Good crew. No crying or screaming children is always good. Dinner was decent & nice that it comes with a glass of wine if you wish."
Cons: "Packed in a sardine can for 9 hours is not fun. Being bussed out to a remote location for a wide bodied plane is crazy. At least at ORD we had a gate."

Pros: "The aircraft was relatively new and well appointed."
Cons: "Service with a frown by half the staff. Took away headphones that I had stowed aside for a later time while taking a nap and gave it to another passenger - on a long haul business class flight. Poor service culture. Outbound flight was terrible. Six hour delay. No apologies. Rude telephone staff."

Pros: "The boarding procedure was much more organized than the previous flight."
Cons: "They served fish on board, and the odor stuck around for awhile."

Pros: "Comfortable seats with nice pillow and blanket"
Cons: "Boarding was awkward and slow."

Cons: "The airline staff closed the gate and would not let all passengers board, causing over 30 to have to be rebooked on flights the next day."

Pros: "Smooth boarding, good vegetarian food options, helpful and friendly staff, and more legroom than my previous flight."
Cons: "No entertainment"

Cons: "The crew could be a little bit more accommodating. Both flights ran short of toilet paper. They don’t conduct an intermediate check of the toilets."

Pros: "Cod fish meal was nice! Lots of movie options, and the staff were nice."
Cons: "Foot rests would have been great to have. The boarding process was exhausting. A long line for another passport check (after the immigration check point) and the long bus ride to the aircraft."

Cons: "It cold be better if there is no flight delay which put in cause all our plans!..."

Cons: "The headphone situation was confusing and no charging ports Fairly comfortable for an older plane"

Cons: "Hand luggage weighing queue delayed flight, Gatwick flights delays, missing luggage at Lisbon,"

Pros: "Nothing"
Cons: "Been on schedule."

Pros: "On time"
Cons: "Food"

Pros: "Self checkin, there was no line and things moved quickly."
Cons: "Flight was almost an hour late because the boarding process was so slow. They took forever and then literally bussed us to the other side of the airport to the budget carrier side, which wasted more time. Was a bit of a joke really. Served seafood snack, not everyone eats seafood."

Cons: "Not missing our connecting flight because if flight / airport delays."

Pros: "Seats are comfortable and room for pack pack under seats"

Pros: "A short but very pleasant flight and food was served, excellent in every category."
Cons: "Nothing, it was the best short flight I've ever had. The staff were very attentive and did a great job of keeping everyone happy."

Pros: "The people on the plane were super nice and the flight was nice as well. the price was cheaper than many others."
Cons: "I am used to traveling continents with other companies. There has always been 2 check in bags allowed with no extra charge as long as you are under 23kg on each. I get to the airport with my 2 bags ready, TAP tells me on large holidays, they only allow 1 bag to be checked to my specific African destination until January 11. And that one bag will cost me $120. They will not let me have the second one. Who does that? How much sense is this supposed to have. I checked with others and they do not do that. That rule rule is unfair and racist. Now that I am back, I have a bag missing. Wow!"

Pros: "The tripulation are very nice people. The food is better last year. Is good."
Cons: "The space between seats are small."

Cons: "I was rerouted to Madrid and did not have the correct timely information to cancel and rebook or to get a credit toward a future flight. There was no clear item on line to be used for my problem."

Pros: "Service was good and the food was better than average."
Cons: "Paying extra for business class so you can sleep just isn't worth it with TAP. We had an older plane, showing its age, and the seats did not go completely flat. So, I kept slipping down and my feet jammed into the seat in front of me."

Pros: "Everything was going well. Confotable seats lovely air hostesses. Food wasn’t so great but I was surprised we even got something!"
Cons: "Unfortunately I had problems at airport security which wasn’t very pleasant!"

Cons: "The long delay, more than 1.5 hours."

Cons: "why do they sell their tickets when they know they can not make the connection? little time between the two flights compared to the functionality of the airport. never again TAP"

Cons: "TAP Airlines stranded us in Lisbon. They were late flying us from Vienna to Lisbon and then canceled our seats on our connection to JFK. Instead, they rebooked us on the next day's flight a full 24 hours after, refusing to rebook us on earlier flights on other carriers. Their customer service was as bad as I've ever experienced. Multiple agents admitted their company is terrible and doesn't care about its customers. The indifference to our situation was surreal. Lesson learned."

Cons: "Stuardes don't have a sense of what costumer service is.. 6 hour flights and their plain aren't equipt with monitors to watch and entertain yourself Thank God I understood portugués but their translation to English was poor Food was not amazing I've been traveling since I was 6yrs old and I never felt so strongly about an airline... Not even easy jet"

Pros: "I was very comfortable with empty seats in my row."
Cons: "No entertainment facilities."

Cons: "I had an awful experience. A flight attendant named Comissário Bruno denied me a second dessert when I asked for one. I was flying business class on flight TP059 on March 4 2018 and have Gold status on Star Alliance. Many passengers had declined dessert and I felt extremely embarrassed by having been denied food on a plane for the first time in my life. The attitude and lack of tact of Comissario Bruno on TP059 spoiled the whole flight experience for me."

Cons: "This event refers to my TAP flight from Lisbon to Heathrow on 21-Jan-2018. We arrived to the airport nearly 2 hours before departure time, waited 35min in the security checks and my girlfriend was held 20min in the passport control. While she was queuing for the 2no police officers to check her passport, an airport assistant came to the queue and asked who was due to board in TP364 to Heathrow. She was made aware that my girlfriend was there due to board that flight. In the meantime I made my way to the gate to make the gate assistants aware that she was held in the passport checks and was already on her way to the gate. Having said that, the zealous assistants in the gate have closed the gate in front of me, 18min before scheduled departure time and - "very kindly" - told me that I wouldn't be boarding that flight anymore even though my girlfriend have arrived in the meantime. One can imagine the frustration I felt finding out that the flight departure was delayed and that the flight actually departed 40min late. At that time I was already suffering the extortion of the customer service from TAP, claiming from me circa 400Eur from each of us for a one way ticket in the next flight to London. Therefore... until I remember this... I AM NOT FLYING TAP ANYMORE... I am very proud of being Portuguese but in similar situations that occurred with me flying British Airways, Lufthansa or Air Italia, I have always been treated with much more respect and customer care!"

Pros: "The food and entertainment was good. We got into the plane ver quickly and we were seated towards the front"
Cons: "I have been flying for a while but it is so difficult to find out what fare class you have. the website is not helpful with bag check in information. $90 is way too much to check in a bag especially for an international flight the line at Lisbon for passports is way too long"

Pros: "Though it was a short flight, they did offer food and left mine on my table since I was sleeping. I woke up super thirsty and hungry so that was a nice surprise."
Cons: "TAP is perpetually delayed. It’s annoying."

Pros: "Nothing"
Cons: "Everything"

Pros: "Hot food and real utensils Good entertaining selection Very nice staff"
Cons: "Everything went well."

Pros: "There was great entertainment on the first flight"

Cons: "connecting flight but no entertainment, very cramped space"

Pros: "The trip was perfect. My bag does not think the same way."
Cons: "Everything was perfect until I receive my bag and notice that two (2) items were missing: my snorkeling face mask, and my camera's tripod. Who is responsible for this? How can I be happy with this?"

Pros: "Not much"
Cons: "Late as always"

Cons: "We were advised as we boarded that there would be no meal/snack service on the 3 hour flight. There was no time to purchase food at this time. It would have been good to have a big sign in the check in desk or a PA announcement so passengers could make alternate arrangements."

Pros: "Boarding was excellent. Flight was relatively smooth."
Cons: "Seats in economy were uncomfortable. Food was fair, at best. Wine was offered with dinner(a plus) but only once."

Pros: "Nothing."
Cons: "Filthy dirty airport, club and plane. No power in the seats to boot. Clown show. Never again see above."

Pros: "flight was smooth and comfortable"
Cons: "no entertainment whatsoever, felt like low cost airline, food was okay, nothing special."

Read more about TAP AIR PORTUGAL
COVID-19 information

Safety measures for airlines flying from London to Illinois

Airlines flying from London to Illinois have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from London to Illinois

Mandatory masks

Masks required on board, masks provided on flights from London to Illinois

Social distancing seating

Middle seats unavailable to book on flights from London to Illinois

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from London to Illinois

Book cheap flights from London to Illinois

Recent round-trip flight deals

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Recent one-way flight deals

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