S$ 624+ Cheap flights to Illinois

— ORD
4 Oct — 11 Oct1
1 adult
1 adult, Economy, 0 bags

Flights to Illinois in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Illinois

Tue 13-1007:00 -
1 stop20h 43m
Tue 20-1015:40 -
1 stop24h 35m
Deal found 30-8S$ 987
Sun 18-1007:00 -
1 stop20h 43m
Thu 29-1015:30 -
1 stop26h 30m
Deal found 3-9S$ 988
Sat 3-1007:00 -
1 stop20h 43m
Sun 18-1015:40 -
1 stop24h 35m
Deal found 1-9S$ 1,001
Sun 18-1007:00 -
1 stop20h 43m
Sun 25-1008:49 -
1 stop33h 11m
Deal found 3-9S$ 1,017
Sat 3-1007:00 -
1 stop26h 06m
Sun 18-1008:49 -
1 stop31h 26m
Deal found 1-9S$ 1,031
Sun 20-901:25 -
2 stops34h 19m
Tue 29-909:59 -
2 stops24h 56m
Deal found 4-9S$ 1,438
Mon 12-1001:25 -
2 stops29h 35m
Tue 20-1010:12 -
2 stops29h 48m
Deal found 30-8S$ 1,527
Mon 9-1122:30 -
2 stops27h 29m
Fri 27-1106:00 -
2 stops28h 10m
Deal found 4-9S$ 1,579
Sun 18-1013:55 -
2 stops29h 10m
Thu 29-1015:55 -
2 stops32h 10m
Deal found 2-9S$ 1,590
Fri 16-1013:55 -
2 stops28h 55m
Fri 23-1016:05 -
2 stops32h 00m
Deal found 1-9S$ 1,591
Thu 1-1013:55 -
2 stops29h 10m
Thu 15-1015:55 -
2 stops31h 35m
Deal found 31-8S$ 1,608
Sun 18-1013:55 -
2 stops29h 10m
Sun 25-1018:30 -
2 stops29h 35m
Deal found 3-9S$ 1,661

Find flights to Illinois

Explore Illinois

Find flight deals to Illinois

Return from

S$ 987

One-way from

S$ 624

Popular in

August

Cheapest in

September

Average price

S$ 1,092
Air Canada
  • Air Canada
  • 13-10-20-10
  • 2 total stops
  • 45h 18m total
  • Singapore to Chicago
Air Canada
  • Air Canada
  • 15-9-31-12
  • 2 total stops
  • 26h 57m total
  • Singapore to Illinois
Highest demand for flights based on searches. 14% potential increase in price (S$ 260 potential increase over avg. return price).
Cheapest flight prices on average. 8% potential price decrease (S$ 113 potential savings vs. average return price).
Average for return flights in September 2026

Cheapflights Fare Finder

 
Use the filters below to find and compare flights to Illinois that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

SingaporeChicago

SIN Singapore Changi - ORD Chicago O'Hare Intl

SINORD

Singapore Changi

Thu 19-11

08:40-17:10

2 stops46h 30m

Chicago O'Hare Intl

Wed 31-12

00:00-13:30

Nonstop0h 00m

S$ 656

SingaporeChicago

SIN Singapore Changi - ORD Chicago O'Hare Intl

SINORD

Singapore Changi

Thu 5-11

19:25-07:55

1 stop26h 30m

Chicago O'Hare Intl

Mon 9-11

13:10-09:35

1 stop30h 25m

S$ 1,165

SingaporeChicago

SIN Singapore Changi - ORD Chicago O'Hare Intl

SINORD

Singapore Changi

Tue 29-9

07:00-20:12

2 stops26h 12m

Chicago O'Hare Intl

Tue 6-10

08:40-05:15

2 stops31h 35m

S$ 1,192
Fastest return journey

SingaporeChicago

SIN Singapore Changi - ORD Chicago O'Hare Intl

SINORD

Singapore Changi

Thu 5-11

22:20-05:04

1 stop20h 44m

Chicago O'Hare Intl

Mon 9-11

06:00-20:15

1 stop24h 15m

S$ 1,306

SingaporeChicago

SIN Singapore Changi - ORD Chicago O'Hare Intl

SINORD

Singapore Changi

Wed 14-10

20:35-05:01

1 stop21h 26m

Chicago O'Hare Intl

Wed 21-10

21:40-18:35

1 stop31h 55m

S$ 1,413

SingaporeChicago

SIN Singapore Changi - MDW Chicago Midway

SINMDW

Singapore Changi

Sun 20-9

01:25-22:44

2 stops34h 19m

Chicago Midway

Tue 29-9

09:59-23:55

2 stops24h 56m

S$ 1,438

SingaporeChicago

SIN Singapore Changi - ORD Chicago O'Hare Intl

SINORD

Singapore Changi

Fri 18-9

06:20-20:45

3 stops27h 25m

Chicago O'Hare Intl

Sun 20-9

00:30-18:45

2 stops29h 15m

S$ 1,438

SingaporeChicago

SIN Singapore Changi - ORD Chicago O'Hare Intl

SINORD

Singapore Changi

Mon 21-9

07:30-20:56

2 stops26h 26m

Chicago O'Hare Intl

Tue 29-9

07:00-05:00

2 stops33h 00m

S$ 1,438

SingaporeChicago

SIN Singapore Changi - ORD Chicago O'Hare Intl

SINORD

Singapore Changi

Thu 18-2

10:10-20:31

1 stop24h 21m

Chicago O'Hare Intl

Fri 5-3

06:00-23:40

2 stops27h 40m

S$ 1,467

SingaporeChicago

SIN Singapore Changi - MDW Chicago Midway

SINMDW

Singapore Changi

Mon 12-10

01:25-18:00

2 stops29h 35m

Chicago Midway

Tue 20-10

10:12-05:00

2 stops29h 48m

S$ 1,527

Flights are sorted by cheapest return flights first.

Deals found on 31-8

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight to Illinois

How long is the flight to Illinois?

On average, a flight from Singapore to Illinois takes 24 hours 12 minutes. Flights to Illinois from other popular cities in Singapore will vary in length. Below are a few examples of popular routes and their flight times.

What are the cheapest airlines that fly to Illinois?

The cheapest airlines flying from Singapore to Illinois are Korean Air, United Airlines and EVA Air.

Rainfall in Illinois by month

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

Temperature in Illinois by month

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular places to fly to in Illinois?

The most popular places in Illinois to fly to are Chicago and Champaign.

Reviews of airlines servicing Illinois

Check out reviews from past customers who have flown EVA Air,Korean Air, andJapan Airlines to the United States to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

8.3

Boarding

8.5

Overall

8.5

Food

8.1

Entertainment

8.0

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Padma,Aug 2026

TPE - SFO

Great but could not allow me to do online booking

Comfort

8.3

Boarding

8.5

Overall

8.5

Food

8.1

Entertainment

8.0

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Padma,Aug 2026

TPE - SFO

Great but could not allow me to do online booking

Comfort

8.3

Boarding

8.5

Overall

8.5

Food

8.1

Entertainment

8.0

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Padma,Aug 2026

TPE - SFO

Great but could not allow me to do online booking

Comfort

8.3

Boarding

8.5

Overall

8.5

Food

8.1

Entertainment

8.0

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Padma,Aug 2026

TPE - SFO

Great but could not allow me to do online booking

Comfort

8.3

Boarding

8.5

Overall

8.5

Food

8.1

Entertainment

8.0

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Padma,Aug 2026

TPE - SFO

Great but could not allow me to do online booking

FAQs about flying to Illinois

Illinois climate

Illinois’s winters are very cold and long with snow and icy winds from late November through to April. Summers, especially July and August, the weather tends to be hot and humid. The best times to visit is when the weather is perfect, in spring and autumn; tornado season can occur anytime between the months of March and May. Chicago’s summers are humid with highs of 30 degrees (Celsius) or more and its winters are bitterly cold.

Getting around Illinois

Public transportation is reliable and taxis are easy to find. Driving is not recommended because of heavy traffic and parking is almost impossible to find. The El, a system operated by The Chicago Transit Authority consists of elevated trains running 24 hours a day. During the summer rush hour a River Bus is available.

What is good to know if travelling to Illinois?

  • Chicago has a wealth of things to see and do. The best view of the city can be found at 1,450 feet from the top of North America’s tallest building – the Sears Tower. Head to the 103rd floor to the Skydeck where you can see the entire city laid out.  The Hancock Building is also well worth a visit and offers stunning city views from its observation deck or cocktail bar.
  • Don’t miss a trip to the Anderson Japanese Gardens in Rockford. Set on twelve acres the gardens are adorned with Japanese maples, magnolias, and rhododendrons and have several ponds and waterfalls with Japanese bronze structures surrounding them. There’s also an authentic tea house and contemporary “Garden of Reflection”.  
  • Visit the preserved Frank Lloyd Wright Museum on Chicago Avenue in Oak Park where the famed architect spent 20 years of his career and designed 130 of his masterpieces.  Wright lived here until 1909.
  • One of the most visited attractions in Chicago is the Art Institute of Chicago. Art lovers – well any visitor – shouldn’t miss a trip to the museum, it’s remarkable. The gargantuan building houses more than 250,000 works of art from all over the world including ancient Egyptian, Japanese, Korean, Greek and Roman relics. One of its highlights is the anthology of Impressionist art which has an impressive collection by Monet, Pablo Picasso and Henri Matisse to name a few.
  • Anyone interested in the lives of the Amish people should head to central Illinois where a welcoming group of Amish villages are set up. Take a tour of the community in the Illinois Amish Interpretative Centre in Arcola, visit a working farm and watch how supper is prepared and enjoyed in a family home.
  • When is the best time to fly to Illinois?

    Peak Season: Winter is peak season in Illinois for skiing and snowmobiling. In summer many different festivals take place in Chicago’s parks and neighbourhoods almost every weekend, making it difficult to find a cheap Illinois flight. Off Season: The best month to book a cheap Illinois flight is September, which is also the mildest month. Autumn is visually the prettiest time to visit when the temperature is still mild and the foliage is changing. The quietest months in Chicago are from January to March but they can also be the coldest and windiest.

  • Can I find cheaper flights to Illinois if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Illinois on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Illinois?

    Based on reviews from Cheapflights users, United Airlines is rated the highest out of the airlines that fly to Illinois.

  • What is the cheapest airport to fly to in Illinois?

    Chicago O'Hare Intl is currently the cheapest airport to fly to in Illinois. One-way flights to Chicago O'Hare Intl typically cost S$ 220, while return flights cost around S$ 462.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around S$ 517, however they can be found for as little as S$ 462.

  • Where does the fastest flight to Illinois depart from?

    For those looking to save time traveling to Illinois, Singapore Changi offers the quickest one-way flight (20 hours 44 minutes).

  • Does Chicago O'Hare Intl have rental cars?

    Yes. Those touching down at Chicago O'Hare Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Chicago O'Hare Intl?

    Yes. Chicago O'Hare Intl has hotels nearby for those requiring accommodations. Hilton Chicago O'Hare Airport is the closest property to Chicago O'Hare Intl (0.0 km away from Chicago O'Hare Intl).

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Find flights to Illinois

Fly with Cheapflights

How does Cheapflights help users find flights to Illinois?

Deals for Illinois flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets to Illinois?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights to Illinois.

Can Cheapflights find flights to Illinois with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights to Illinois flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights to Illinois become cheaper?

Yes, Cheapflights has a feature called Price Alerts, which notifies users when flight prices change. Track prices for your flight to Illinois today and book when you’re ready!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.