S$ 65+ Cheap flights from Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30-12. 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.
ORD — SIN
12 Oct — 19 Oct1
1 adult
1 adult, Economy

What to know about flights from Illinois

Discover essential information about flights departing from Illinois, including flight schedules, destinations, airlines operating at the Illinois airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 12 September 2025.

Good round-trip deal

S$ 255 or less

Good one-way deal

S$ 88 or less
Price to beat on a round-trip flight from Illinois.
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Price to beat on a one-way flight from Illinois.
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Find flights from Illinois

Cheapest flights from Illinois
Explore the most affordable flight options available from Illinois. Find the lowest fares based on data from user searches, with prices last updated on 12 September 2025.

Tue 10-210:35ORD - GRR
Nonstop1h 17mUnited Airlines
Wed 11-209:00GRR - ORD
Nonstop1h 19mUnited Airlines
Deal found 11-9S$ 130
Sat 18-1010:35ORD - GRR
Nonstop1h 12mUnited Airlines
Sat 18-1016:49GRR - ORD
Nonstop1h 16mUnited Airlines
Deal found 9-9S$ 145
Wed 1-1010:35ORD - GRR
Nonstop1h 12mUnited Airlines
Fri 3-1006:00GRR - ORD
Nonstop1h 11mUnited Airlines
Deal found 9-9S$ 150
Wed 15-1019:59ORD - ONT
Nonstop4h 31mUnited Airlines
Wed 12-1107:00ONT - ORD
Nonstop3h 57mUnited Airlines
Deal found 9-9S$ 209
Tue 7-1007:10ORD - GRR
1 stop5h 16mDelta
Sat 18-1006:45GRR - ORD
1 stop3h 27mDelta
Deal found 11-9S$ 227
Sat 18-1015:35ORD - ONT
Nonstop4h 31mUnited Airlines
Fri 14-1107:00ONT - ORD
Nonstop3h 57mUnited Airlines
Deal found 9-9S$ 230
Wed 22-1013:00ORD - ONT
1 stop6h 23mUnited Airlines
Sat 15-1107:00ONT - ORD
Nonstop3h 57mUnited Airlines
Deal found 9-9S$ 237
Sat 18-1015:35ORD - ONT
Nonstop4h 31mUnited Airlines
Sun 16-1118:38ONT - ORD
1 stop8h 22mUnited Airlines
Deal found 9-9S$ 242
Fri 14-1119:55ORD - ONT
Nonstop4h 36mUnited Airlines
Sun 16-1107:00ONT - ORD
Nonstop3h 57mUnited Airlines
Deal found 11-9S$ 250
Thu 2-1019:59ORD - ONT
Nonstop4h 31mUnited Airlines
Wed 8-1013:15ONT - ORD
1 stop8h 44mUnited Airlines
Deal found 10-9S$ 263
Mon 27-1018:55ORD - ONT
1 stop16h 30mSouthwest
Tue 28-1013:30ONT - ORD
1 stop8h 10mSouthwest
Deal found 10-9S$ 264
Tue 30-911:05ORD - GRR
1 stop3h 13mDelta
Wed 1-1005:30GRR - ORD
1 stop5h 49mDelta
Deal found 11-9S$ 267

Find flights from Illinois within your budget

 
Find flights departing from Illinois that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 12 September 2025. In the last 7 days, Cheapflights users made a total of 200,618 searches

Fly to

Singapore

Route

Depart

Return

Price

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Wed 1-10

10:35-12:47

Nonstop1h 12m

Grand Rapids Gerald R. Ford Intl

Fri 3-10

06:00-06:11

Nonstop1h 11m

S$ 150

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Sat 11-10

07:10-13:26

1 stop5h 16m

Grand Rapids Gerald R. Ford Intl

Sat 18-10

06:45-09:12

1 stop3h 27m

S$ 227

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Tue 7-10

07:10-13:26

1 stop5h 16m

Grand Rapids Gerald R. Ford Intl

Sat 18-10

06:45-09:12

1 stop3h 27m

S$ 227

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 18-10

16:25-22:52

1 stop8h 27m

Ontario

Sat 15-11

07:00-12:57

Nonstop3h 57m

S$ 242

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Thu 30-10

08:55-15:29

1 stop5h 34m

Grand Rapids Gerald R. Ford Intl

Fri 31-10

06:45-09:43

1 stop3h 58m

S$ 267

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Sun 26-10

08:55-15:29

1 stop5h 34m

Grand Rapids Gerald R. Ford Intl

Sun 2-11

05:30-09:43

1 stop5h 13m

S$ 267

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Tue 14-10

07:10-13:26

1 stop5h 16m

Grand Rapids Gerald R. Ford Intl

Sun 19-10

05:30-07:50

1 stop3h 20m

S$ 267

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 10-1

07:45-15:12

1 stop9h 27m

Ontario

Mon 12-1

11:30-23:59

1 stop10h 29m

S$ 274

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Tue 24-2

14:05-19:47

1 stop7h 42m

Ontario

Thu 26-2

18:55-05:04

1 stop8h 09m

S$ 274

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Sat 21-2

14:05-19:47

1 stop7h 42m

Ontario

Tue 3-3

18:55-05:04

1 stop8h 09m

S$ 274

Flights are sorted by cheapest return flights first.

Deals found on 9-9

Showing 1-10 of 60 results
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Best time to book a flight from Illinois

Have a flexible travel schedule? Discover the best time to fly from Illinois with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Illinois

Get recent, data-driven insights about flights from Illinois including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Illinois?

Currently, October is the cheapest month in which you can book a flight from Illinois (average of S$ 890). Flying from Illinois in June will prove the most costly (average of S$ 1,546). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Which airlines fly from Illinois?

When flying from Illinois check dates and pricing for the following: United Airlines, Turkish Airlines. As they depart for the following popular destinations: Singapore.

United Airlines
United Airlines
From S$ 713
Turkish Airlines
Turkish Airlines
From S$ 816

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is Pittsburgh, with prices starting at S$ 60. Explore other affordable destinations below.

Pittsburgh
Pittsburgh
From S$ 46
Buffalo
Buffalo
From S$ 199
New York
New York
From S$ 213
Atlanta Hartsfield-Jackson
Atlanta Hartsfield-Jackson
From S$ 408

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Direct flights from Boise

Related info for your journey

Access useful and relevant information related to your journey from Illinois. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 12 September 2025.

  • What is the cheapest month to fly from Illinois?

    Currently, the cheapest month for flights from Illinois is October. The most expensive month for flights is June. The cheapest prices are shown above but prices will vary according to departure times, airlines, class and how early you book.

  • Where are the cheapest places to fly to from Illinois?

    View the cheapest flight destinations from Illinois:
    Fly from Chicago to Singapore from S$ 915 round trip

  • How does Cheapflights help users find flights from Illinois?

    When you search for this flight from Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

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

    By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights from Illinois.

  • Can Cheapflights find flights from Illinois with no change fees?

    Yes! Cheapflights helps users easily find flights from Illinois with no change fees.

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

    Yes! Start tracking prices for flights from Illinois today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.

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How does Cheapflights help users find flights from Illinois?

When you search for this flight from Illinois, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the best flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights from Illinois.

Can Cheapflights find flights from Illinois with no change fees?

Yes! Cheapflights helps users easily find flights from Illinois with no change fees.

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

Yes! Start tracking prices for flights from Illinois today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive the alerts.

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