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S$ 138+ 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 13-5. 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
23 Apr — 30 Apr1
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 18 April 2025.

Good round-trip deal

S$ 261 or less

Good one-way deal

S$ 156 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 18 April 2025.

Thu 15-509:00ORD - GRR
Nonstop1h 10mUnited Airlines
Thu 22-507:30GRR - ORD
Nonstop1h 08mUnited Airlines
Deal found 17-4S$ 151
Sat 24-507:10ORD - GRR
1 stop5h 04mDelta
Wed 28-506:20GRR - ORD
1 stop4h 31mDelta
Deal found 18-4S$ 261
Mon 2-621:56ORD - ONT
1 stop24h 55mFrontier
Mon 9-606:00ONT - ORD
1 stop12h 56mFrontier
Deal found 17-4S$ 286
Thu 5-619:55ORD - ONT
Nonstop4h 31mUnited Airlines
Sat 21-607:00ONT - ORD
Nonstop3h 58mUnited Airlines
Deal found 18-4S$ 298
Wed 28-508:00ORD - ONT
1 stop9h 50mHawaiian Airlines
Tue 3-606:00ONT - ORD
1 stop10h 55mHawaiian Airlines
Deal found 17-4S$ 323
Tue 10-618:55ORD - ONT
1 stop6h 15mSouthwest
Sat 16-805:45ONT - ORD
1 stop6h 20mSouthwest
Deal found 17-4S$ 324
Mon 12-508:50ORD - PWM
1 stop4h 54mUnited Airlines
Fri 16-518:55PWM - ORD
1 stop5h 20mUnited Airlines
Deal found 17-4S$ 328
Fri 19-913:35ORD - PWM
1 stop7h 24mJetBlue
Mon 22-907:30PWM - ORD
1 stop6h 10mJetBlue
Deal found 18-4S$ 331
Sat 3-518:35ORD - PWM
1 stop5h 07mDelta
Tue 6-505:20PWM - ORD
2 stops8h 19mDelta
Deal found 17-4S$ 333
Tue 20-507:30ORD - ONT
1 stop6h 45mDelta
Wed 11-311:29ONT - ORD
1 stop10h 15mDelta
Deal found 18-4S$ 337
Tue 3-608:00ORD - ONT
1 stop9h 50mAlaska Airlines
Tue 10-619:20ONT - ORD
1 stop8h 20mAlaska Airlines
Deal found 17-4S$ 349
Thu 10-713:50ORD - PWM
1 stop9h 15mSouthwest
Wed 16-705:30PWM - ORD
2 stops10h 30mSouthwest
Deal found 17-4S$ 367

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 18 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

Mon 2-6

21:56-20:51

1 stop24h 55m

Ontario

Mon 9-6

06:00-20:56

1 stop12h 56m

S$ 286

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Thu 5-6

19:55-22:26

Nonstop4h 31m

Ontario

Sat 21-6

07:00-12:58

Nonstop3h 58m

S$ 298

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Wed 28-5

08:00-15:50

1 stop9h 50m

Ontario

Tue 3-6

06:00-18:55

1 stop10h 55m

S$ 323

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Tue 10-6

18:55-23:10

1 stop6h 15m

Ontario

Sat 16-8

05:45-14:05

1 stop6h 20m

S$ 324

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Sun 11-5

21:20-23:28

Nonstop1h 08m

Grand Rapids Gerald R. Ford Intl

Thu 15-5

07:15-07:22

Nonstop1h 07m

S$ 327

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Mon 12-5

08:50-14:44

1 stop4h 54m

Portland

Fri 16-5

18:55-23:15

1 stop5h 20m

S$ 328

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Fri 19-9

13:35-21:59

1 stop7h 24m

Portland

Mon 22-9

07:30-12:40

1 stop6h 10m

S$ 331

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

13:59-16:30

1 stop3h 31m

S$ 331

ChicagoPortland

ORD - PWM

ORDPWM

Chicago O'Hare Intl

Sat 3-5

18:35-00:42

1 stop5h 07m

Portland

Mon 5-5

16:40-23:59

2 stops8h 19m

S$ 333

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Tue 20-5

07:30-12:15

1 stop6h 45m

Ontario

Wed 11-3

11:29-23:44

1 stop10h 15m

S$ 337

Flights are sorted by cheapest return flights first.

Deals found on 18-4

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$ 955). Flying from Illinois in June will prove the most costly (average of S$ 1,573). 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

Phoenix Sky Harbor Intl

Phoenix Sky Harbor Intl

From S$ 256

Rome

Rome

From S$ 719

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
1,179 reviews
Check prices

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very Good
1,179 reviews
EVA Air
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Korean Air
8.4
Very Good
1,063 reviews
EVA Air
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Japan Airlines
8.3
Very Good
1,447 reviews
EVA Air
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
ANA
8.3
Very Good
845 reviews
EVA Air
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
China Airlines
8.2
Very Good
729 reviews
EVA Air
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Overall

8.4

Crew

8.6

Food

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

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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 18 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$ 1,040 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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