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S$ 162+ Cheap flights from Illinois

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4-6. 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
4 May — 11 May1
1 adult

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 29 April 2025.

Good round-trip deal

S$ 260 or less

Good one-way deal

S$ 155 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 29 April 2025.

Fri 6-606:00ORD - ONT
1 stop19h 50mFrontier
Sun 8-600:59ONT - ORD
1 stop21h 00mFrontier
Deal found 29-4S$ 285
Mon 2-619:55ORD - ONT
Nonstop4h 31mUnited Airlines
Wed 4-607:00ONT - ORD
Nonstop4h 03mUnited Airlines
Deal found 28-4S$ 297
Sat 31-507:10ORD - GRR
1 stop5h 04mDelta
Sat 7-617:41GRR - ORD
1 stop4h 19mDelta
Deal found 29-4S$ 314
Thu 21-807:00ORD - PWM
1 stop5h 59mDelta
Wed 27-811:25PWM - ORD
2 stops10h 09mDelta
Deal found 29-4S$ 319
Tue 19-806:00ORD - ONT
1 stop9h 26mAlaska Airlines
Sun 24-807:10ONT - ORD
1 stop19h 50mAlaska Airlines
Deal found 29-4S$ 322
Fri 24-1013:50ORD - PWM
1 stop9h 15mSouthwest
Tue 28-1007:40PWM - ORD
1 stop5h 10mSouthwest
Deal found 29-4S$ 332
Thu 15-506:15ORD - PWM
1 stop7h 25mJetBlue
Tue 20-515:35PWM - ORD
1 stop7h 19mJetBlue
Deal found 29-4S$ 334
Fri 13-619:20ORD - ONT
1 stop6h 26mDelta
Fri 20-622:05ONT - ORD
1 stop8h 34mDelta
Deal found 29-4S$ 336
Wed 15-1007:10ORD - PWM
1 stop5h 31mUnited Airlines
Sun 19-1006:00PWM - ORD
Nonstop2h 51mUnited Airlines
Deal found 29-4S$ 339
Fri 13-607:00ORD - GRR
Nonstop0h 56mAmerican Airlines
Fri 20-607:05GRR - ORD
Nonstop1h 08mAmerican Airlines
Deal found 29-4S$ 343
Thu 4-906:20ORD - ONT
1 stop9h 49mHawaiian Airlines
Mon 8-919:22ONT - ORD
1 stop9h 41mHawaiian Airlines
Deal found 29-4S$ 348
Fri 6-621:10ORD - GRR
Nonstop1h 05mUnited Airlines
Wed 11-612:55GRR - ORD
Nonstop1h 14mUnited Airlines
Deal found 29-4S$ 381

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 29 April 2025. In the last 7 days, Cheapflights users made a total of 200,618 searches

Fly to

Singapore

Route

Depart

Return

Price

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Fri 6-6

06:00-23:50

1 stop19h 50m

Ontario

Sun 8-6

00:59-23:59

1 stop21h 00m

S$ 285

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Mon 2-6

19:55-22:26

Nonstop4h 31m

Ontario

Wed 4-6

07:00-13:03

Nonstop4h 03m

S$ 297

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Sat 31-5

07:10-13:14

1 stop5h 04m

Grand Rapids Gerald R. Ford Intl

Sat 7-6

17:41-21:00

1 stop4h 19m

S$ 314

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Thu 21-8

07:00-13:59

1 stop5h 59m

Portland

Wed 27-8

11:25-20:34

2 stops10h 09m

S$ 319

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Tue 19-8

06:00-13:26

1 stop9h 26m

Ontario

Sun 24-8

07:10-05:00

1 stop19h 50m

S$ 322

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Fri 24-10

13:50-00:05

1 stop9h 15m

Portland

Tue 28-10

07:40-11:50

1 stop5h 10m

S$ 332

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Thu 15-5

06:15-14:40

1 stop7h 25m

Portland

Tue 20-5

15:35-21:54

1 stop7h 19m

S$ 334

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Fri 13-6

19:20-23:46

1 stop6h 26m

Ontario

Fri 20-6

22:05-08:39

1 stop8h 34m

S$ 336

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Wed 15-10

07:10-13:41

1 stop5h 31m

Portland

Sun 19-10

06:00-07:51

Nonstop2h 51m

S$ 339

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Fri 13-6

07:00-08:56

Nonstop0h 56m

Grand Rapids Gerald R. Ford Intl

Fri 20-6

07:05-07:13

Nonstop1h 08m

S$ 343

Flights are sorted by cheapest return flights first.

Deals found on 29-4

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, March is the cheapest month in which you can book a flight from Illinois (average of S$ 954). Flying from Illinois in June will prove the most costly (average of S$ 1,569). 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. As it departs for the following popular destinations: Singapore.

United Airlines

United Airlines

From S$ 836

What is the cheapest place to fly to from Illinois?

The cheapest city to fly to from Illinois is San Francisco, with prices starting at S$ 141. Explore other affordable destinations below.

San Francisco

San Francisco

From S$ 107

Buffalo

Buffalo

From S$ 199

Rome

Rome

From S$ 719

Amsterdam Schiphol

Amsterdam Schiphol

From S$ 1,146

Airline reviews for flights from Illinois

Get insights into the airlines that provide service from Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from Illinois. In the last 7 days, Cheapflights users made a total of 200,618 searches.
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Crew

8.6

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
EVA Air
8.4
Very Good
1,186 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Crew

8.6

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Korean Air
8.4
Very Good
1,066 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Crew

8.6

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Japan Airlines
8.3
Very Good
1,459 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Crew

8.6

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
China Airlines
8.3
Very Good
729 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Crew

8.6

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop
Singapore Airlines
8.1
Very Good
1,292 reviews
EVA Air
8.4
Very Good
1,186 reviews
Check prices

Boarding

8.4

Crew

8.6

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Dale,Apr 2025

SFO - TPE

Great experience. Check in process was excellent - both online and bag drop

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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 29 April 2025.

  • What is the cheapest month to fly from Illinois?

    Currently, the cheapest month for flights from Illinois is March. 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$ 1,005 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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