HK$3,604+ Cheap flights to 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 25-4. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
13 Jan — 20 Jan1
1 adult
1 adult, Economy, 0 bags

Flights to Illinois in 2025

Enter your travel dates to find the best prices.

Cheapest flights to Illinois
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 14 December 2025.

Thu 25-1212:35HKG - ORD
Nonstop14h 20mCathay Pacific
Fri 9-114:35ORD - HKG
Nonstop15h 55mCathay Pacific
Deal found 12-12HK$6,896
Thu 25-1222:30HKG - ORD
1 stop20h 57mUnited Airlines
Fri 9-118:29ORD - HKG
1 stop22h 16mUnited Airlines
Deal found 14-12HK$7,371
Thu 25-1211:20HKG - ORD
1 stop22h 15mMultiple Airlines
Fri 9-108:00ORD - HKG
2 stops24h 40mMultiple Airlines
Deal found 12-12HK$7,908
Thu 25-1220:25HKG - ORD
2 stops28h 53mAir Canada
Fri 9-115:35ORD - HKG
1 stop37h 05mAir Canada
Deal found 12-12HK$8,227
Thu 25-1218:10HKG - MDW
2 stops37h 16mDelta
Fri 9-118:30MDW - HKG
2 stops38h 40mDelta
Deal found 12-12HK$10,851
Sun 21-1200:55HKG - MDW
2 stops30h 31mDelta
Thu 1-106:00MDW - HKG
2 stops27h 10mDelta
Deal found 12-12HK$19,537
Sat 20-1218:10HKG - MDW
2 stops37h 16mDelta
Thu 25-1206:00MDW - HKG
2 stops39h 20mDelta
Deal found 12-12HK$22,433

Find flights to Illinois

Browse one-way and return flights deals to Illinois on Cheapflights. Flight deals are based on user searches and were last updated on 14 December 2025
Explore Illinois

Find flight deals to Illinois

Find the latest flights to Illinois in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 70,647 searches and data was last updated on 14 December 2025.

Return from

HK$5,947

One-way from

HK$3,604

Popular in

February

Cheapest in

September

Average price

HK$7,628

Good round-trip deal

HK$9,217 or less
19-5-17-9
  • 19-5-17-9
  • 4 total stops
  • 51h 30m total
  • Hong Kong to Chicago
12-2
  • 12-2
  • 2 total stops
  • 29h 56m total
  • Hong Kong to Illinois
Highest demand for flights based on searches. 8% potential increase in price (HK$914 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (HK$412 potential savings vs. average return price).
Average for return flights in December 2025
Price to beat on a round-trip flight from Hong Kong Intl to Illinois.

Cheapflights Fare Finder

 
Locate flights to Illinois that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 70,647 searches and data was last updated on 14 December 2025.
Use the filters below to find and compare flights to Illinois that are best for you.

Fly from

Hong Kong

Route

Departure

Return

Price

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Mon 26-1

17:35-14:38

2 stops35h 03m

Chicago O'Hare Intl

Mon 2-2

15:35-10:10

2 stops28h 35m

HK$5,947

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Tue 19-5

17:30-05:40

2 stops25h 10m

Chicago O'Hare Intl

Thu 17-9

17:55-09:15

2 stops26h 20m

HK$5,947

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Tue 19-5

11:05-21:00

1 stop22h 55m

Chicago O'Hare Intl

Wed 16-9

00:30-19:55

1 stop30h 25m

HK$6,196

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Sat 24-1

13:30-19:35

1 stop20h 05m

Chicago O'Hare Intl

Mon 26-1

23:30-09:00

1 stop19h 30m

HK$6,196

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Sun 25-1

19:40-19:35

1 stop37h 55m

Chicago O'Hare Intl

Wed 28-1

23:30-20:05

1 stop30h 35m

HK$6,725

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Sat 7-2

15:30-19:35

1 stop18h 05m

Chicago O'Hare Intl

Tue 17-2

23:30-09:00

1 stop19h 30m

HK$6,725

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Sat 7-2

15:30-19:35

1 stop18h 05m

Chicago O'Hare Intl

Sun 15-2

23:30-18:30

1 stop29h 00m

HK$6,725

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Tue 27-1

20:25-17:03

2 stops34h 38m

Chicago O'Hare Intl

Tue 3-2

20:10-18:40

2 stops32h 30m

HK$7,013

Hong KongSt. Louis

HKG - STL

HKGSTL

Hong Kong Intl

Wed 13-5

14:00-10:35

2 stops33h 35m

Lambert-St Louis

Tue 19-5

08:35-09:15

2 stops35h 40m

HK$7,068

Hong KongChicago

HKG - MDW

HKGMDW

Hong Kong Intl

Fri 20-3

17:35-05:30

2 stops24h 55m

Chicago Midway

Wed 25-3

10:05-09:15

2 stops34h 10m

HK$7,068

Flights are sorted by cheapest return flights first.

Deals found on 11-12

Showing 1-10 of 23 results
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2
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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
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.

Cheapflights Insights

Everything you need to know about your flight to Illinois

How long is the flight to Illinois?

On average, a flight from Hong Kong to Illinois takes 18 hours 46 minutes. Flights to Illinois from other popular cities in Hong Kong 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 Hong Kong to Illinois are EVA Air and Cathay Pacific.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals 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

Plan your trip to Illinois by taking into account the average temperature totals 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).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 14 December 2025.
See what other customers who have flown with EVA Air and Cathay Pacific to the United States have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

8.0

Boarding

8.4

Overall

8.5

Crew

8.6

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

Entertainment

8.0

Boarding

8.4

Overall

8.5

Crew

8.6

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

Entertainment

8.0

Boarding

8.4

Overall

8.5

Crew

8.6

Comfort

8.3

Food

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2025

TPE - CRK

All was okay except for the medical emergency that happened before our boarding. I wish that the medical emergency response was more immediate.

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, Cathay Pacific 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 HK$265, while return flights cost around HK$1,311.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around HK$2,199, however they can be found for as little as HK$1,311.

  • Where does the fastest flight to Illinois depart from?

    For those looking to save time traveling to Illinois, Hong Kong Intl offers the quickest one-way flight (14 hours 20 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

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

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

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Yes, Cheapflights offers price alerts on Illinois flights so you can book your flight when prices are ideal. Enable price alerts by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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