Flight to Illinois

View S$740 flight on Fri, 27 Mar, 2026Opens in a new window

Popular airlines to Illinois

  • Delta

    Delta

  • American Airlines

    American Airlines

  • United

    United

  • Frontier Airlines

    Frontier Airlines

  • Southwest Airlines

    Southwest Airlines

  • Spirit Airlines

    Spirit Airlines

  • Alaska Airlines

    Alaska Airlines

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Cheap round-trip flights to Illinois

Prices were available within the past 7 days and start at S$740 for one-way flights and S$1,081 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,081 Return, found 4 days ago
S$1,081
Return
found 4 days ago
Select Swiss International Air Lines flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,081 found 4 days ago
American Airlines
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,086 Return, found 4 days ago
S$1,086
Return
found 4 days ago
Select American Airlines flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,086 found 4 days ago
Swiss International Air Lines
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,108 Return, found 4 days ago
S$1,108
Return
found 4 days ago
Select Swiss International Air Lines flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,108 found 4 days ago
Turkish Airlines
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,111 Return, found 4 days ago
S$1,111
Return
found 4 days ago
Select Turkish Airlines flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,111 found 4 days ago
United
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,112 Return, found 4 days ago
S$1,112
Return
found 4 days ago
Select United flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,112 found 4 days ago
Lufthansa
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,132 Return, found 4 days ago
S$1,132
Return
found 4 days ago
Select Lufthansa flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,132 found 4 days ago
Air Canada
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,155 Return, found 4 days ago
S$1,155
Return
found 4 days ago
Select Air Canada flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,155 found 4 days ago
KLM
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,158 Return, found 4 days ago
S$1,158
Return
found 4 days ago
Select KLM flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,158 found 4 days ago
Delta
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,170 Return, found 4 days ago
S$1,170
Return
found 4 days ago
Select Delta flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,170 found 4 days ago
British Airways
Sun, 15 Feb - Sun, 1 Mar
LIS
Lisbon
ORD
Chicago
S$1,171 Return, found 4 days ago
S$1,171
Return
found 4 days ago
Select British Airways flight, departing Sun, 15 Feb from Lisbon to Chicago, returning Sun, 1 Mar, priced at S$1,171 found 4 days ago
Expedia offers flights to Illinois to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Illinois or destinations around the world and discover how easy it is to make your flight reservations on Expedia.

Illinois Flights Information

Airlines serving
American Airlines, United, Japan Airlines, China Airlines, Korean Air, Delta, Air India, All Nippon Airways, LOT-Polish Airlines, Swiss International Air Lines, Turkish Airlines, Lufthansa, Air Canada, KLM, British Airways
Roundtrip price
from S$1,081

Frequently asked questions

How do I find cheap flights to Illinois that have flexible change policies?
Search for cheap flights to Illinois, then tick the "No change fee" box under the "Flexible change policies" heading. From then on it's smooth sailing. We understand that travel plans change and flexibility is essential, so book with confidence with Expedia.
Which airlines fly to Illinois?
Whether you're travelling somewhere new or rendezvousing at a favourite haunt, these airlines are waiting to take you into or near Illinois:

  • United Airlines - 13,063 flights to or near Illinois each month, including 12,950 flights to O'Hare Intl. Airport (ORD) and 108 flights to Quad City Intl. Airport (MLI) per month.
  • American Airlines - 8,977 flights to or near Illinois each month, including 8,855 flights to O'Hare Intl. Airport (ORD) and 121 flights to Quad City Intl. Airport (MLI) per month.
  • Southwest Airlines - 5,997 flights to or near Illinois each month, including 5,334 flights to Midway Intl. Airport (MDW) and 663 flights to O'Hare Intl. Airport (ORD) per month.

How can I find cheap tickets to Illinois?
One of the easiest ways to find cheap tickets to Illinois is to be flexible with your travel dates. Search for your flights, then click "flexible dates" at the top of your results. It'll reveal the cheapest prices for nearby days. The lowest price for a flight to Illinois in the last seven days was S$1,081. Booking well in advance will generally help you score an even bigger bargain.
How much is a flight to Illinois?
There were plenty of bargain fares up for grabs in the last seven days, with the cost of a return airfare to Illinois ranging between S$1,081 and S$1,177. Many lucky travellers nabbed one-way tickets from Lisbon (LIS) for as little as S$740.
What are the most popular airports to fly into in Illinois?
Touch down at one of these top Illinois airports and you'll be perfectly placed to discover all that this wonderful region has to offer:

  • O'Hare Intl. Airport (ORD) - 25,318 flights per month.
  • Midway Intl. Airport (MDW) - 5,962 flights per month.
  • Quad City Intl. Airport (MLI) - 325 flights per month.

When is the cheapest time to fly to Illinois?
Take off for Illinois early in the week and you'll usually be rewarded more economical fares. Tuesday is typically the cheapest day to hop on a plane, followed by Monday. If you're hoping to avoid the most expensive flights, steer clear of Saturdays.
How much is a plane ticket to Illinois?
In the last seven days, plane fares to Illinois ranged from S$1,081 to S$1,177.
What is the best time to go to Illinois?
A terrific time to check out Chicago is after June 20 when the summer season starts. In Illinois's main city, average temperatures range from 18ºC to 24ºC at this time — ideal weather for sightseeing! May, June and August are the most popular months to head to this hot spot.
What months are the cheapest to book a flight to Illinois?
The top month to purchase affordable flights to Illinois is February. Remember that in the U.S, an expensive time to reserve a ticket is during the busy month of December.

Trending flights to Illinois

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, 9 Feb - Thu, 19 Feb
SIN
Singapore
ORD
Chicago
S$1,177 Return, found 5 days ago
S$1,177
Return
found 5 days ago
Select Air Canada flight, departing Mon, 9 Feb from Singapore to Chicago, returning Thu, 19 Feb, priced at S$1,177 found 5 days ago
*Available to Expedia members.