HK$4,007+ 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 2-9. Fares are subject to change and may not be available on all flights or dates of travel.
— ORD
31 Jul — 7 Aug1
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
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 1 July 2026.

Tue 10-1118:10
HKG
-
ORD
1 stop28h 20m
Korean Air
Thu 6-512:20
ORD
-
HKG
1 stop39h 00m
Korean Air
Deal found 30-6HK$6,438
Wed 2-922:30
HKG
-
ORD
1 stop19h 31m
United Airlines
Tue 27-1016:20
ORD
-
HKG
2 stops25h 40m
United Airlines
Deal found 30-6HK$6,509
Tue 1-900:45
HKG
-
ORD
1 stop21h 45m
Korean Air
Tue 27-1012:15
ORD
-
HKG
1 stop21h 55m
Korean Air
Deal found 30-6HK$6,697
Thu 24-900:45
HKG
-
ORD
2 stops25h 14m
Delta
Sun 18-1014:55
ORD
-
HKG
1 stop25h 10m
Delta
Deal found 25-6HK$6,815
Thu 24-900:45
HKG
-
MDW
2 stops24h 54m
Delta
Fri 16-1013:00
MDW
-
HKG
2 stops27h 05m
Delta
Deal found 25-6HK$6,815
Sun 8-1100:55
HKG
-
ORD
1 stop21h 35m
Korean Air
Fri 13-1111:15
ORD
-
HKG
1 stop34h 05m
Korean Air
Deal found 29-6HK$6,831
Sat 26-909:25
HKG
-
MDW
2 stops21h 55m
Delta
Sat 17-1010:35
MDW
-
HKG
2 stops29h 30m
Delta
Deal found 25-6HK$6,831
Fri 25-900:45
HKG
-
ORD
2 stops33h 53m
Delta
Fri 16-1014:55
ORD
-
HKG
1 stop25h 10m
Delta
Deal found 25-6HK$6,878
Tue 10-1110:45
HKG
-
ORD
2 stops21h 55m
Air Canada
Thu 6-511:50
ORD
-
HKG
2 stops28h 25m
Air Canada
Deal found 30-6HK$7,348
Sat 26-900:45
HKG
-
MDW
2 stops28h 31m
Delta
Sun 18-1013:00
MDW
-
HKG
2 stops27h 05m
Delta
Deal found 25-6HK$7,615
Sat 26-900:45
HKG
-
ORD
2 stops25h 14m
Delta
Fri 16-1012:10
ORD
-
HKG
1 stop21h 35m
Delta
Deal found 25-6HK$7,662
Wed 8-709:45
HKG
-
ORD
2 stops35h 15m
Air Canada
Wed 5-815:40
ORD
-
HKG
1 stop24h 35m
Air Canada
Deal found 28-6HK$7,701

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 1 July 2026
Explore Illinois

Find flight deals to Illinois

Find the latest flights to Illinois in 2026, 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 1 July 2026.

Return from

HK$6,109

One-way from

HK$4,007

Popular in

July

Cheapest in

September

Average price

HK$14,108

Good round-trip deal

HK$14,147 or less
United Airlines
  • United Airlines
  • 2-10-10-10
  • 3 total stops
  • 63h 54m total
  • Hong Kong to Chicago
Korean Air
  • Korean Air
  • 2-9
  • 1 total stop
  • 34h 10m total
  • Hong Kong to Illinois
Highest demand for flights based on searches. 27% potential increase in price (HK$3,392 potential increase over avg. return price).
Cheapest flight prices on average. 5% potential price decrease (HK$475 potential savings vs. average return price).
Average for return flights in July 2026
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 1 July 2026.
Use the filters below to find and compare flights to Illinois that are best for you.

Fly from

Route

Departure

Return

Price

Cheapest return flight

Hong KongChicago

HKG - MDW

HKGMDW

Hong Kong Intl

Thu 24-9

00:45-12:39

2 stops24h 54m

Chicago Midway

Fri 16-10

13:00-05:05

2 stops27h 05m

HK$6,815
Fastest return journey

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Fri 10-7

12:40-19:05

1 stop19h 25m

Chicago O'Hare Intl

Thu 6-8

20:30-05:40

1 stop20h 10m

HK$8,760

Hong KongChicago

HKG - MDW

HKGMDW

Hong Kong Intl

Mon 13-7

12:20-22:15

2 stops22h 55m

Chicago Midway

Thu 16-7

13:18-05:05

2 stops26h 47m

HK$8,838

Hong KongChicago

HKG - MDW

HKGMDW

Hong Kong Intl

Tue 14-7

12:20-22:15

2 stops22h 55m

Chicago Midway

Fri 17-7

09:19-05:05

2 stops30h 46m

HK$8,838

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Mon 13-7

09:25-23:53

2 stops27h 28m

Chicago O'Hare Intl

Thu 16-7

07:29-05:05

1 stop32h 36m

HK$8,862

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Wed 26-8

09:25-23:57

2 stops27h 32m

Chicago O'Hare Intl

Mon 31-8

17:10-05:05

1 stop22h 55m

HK$8,862

Hong KongChicago

HKG - MDW

HKGMDW

Hong Kong Intl

Wed 26-8

09:25-22:36

2 stops26h 11m

Chicago Midway

Mon 31-8

16:39-05:05

2 stops23h 26m

HK$8,862

Hong KongSt. Louis

HKG - STL

HKGSTL

Hong Kong Intl

Wed 4-11

01:00-08:58

2 stops21h 58m

Lambert-St Louis

Sun 8-11

07:00-19:10

1 stop22h 10m

HK$9,058

Hong KongSt. Louis

HKG - STL

HKGSTL

Hong Kong Intl

Thu 5-11

18:05-23:58

2 stops43h 53m

Lambert-St Louis

Sun 8-11

07:29-14:50

2 stops41h 21m

HK$9,199

Hong KongChicago

HKG - ORD

HKGORD

Hong Kong Intl

Sat 18-7

21:45-05:46

1 stop21h 01m

Chicago O'Hare Intl

Sat 25-7

20:18-05:40

1 stop20h 22m

HK$9,207

Flights are sorted by cheapest return flights first.

Deals found on 29-6

Showing 1-10 of 23 resultsSorted by cheapest first
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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 23 hours 8 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.

Weekly flight availability to Illinois

The most flights from Hong Kong to Illinois are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

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 1 July 2026.
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.

Food

8.1

Boarding

8.4

Crew

8.7

Comfort

8.3

Overall

8.5

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?

Food

8.1

Boarding

8.4

Crew

8.7

Comfort

8.3

Overall

8.5

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?

Food

8.1

Boarding

8.4

Crew

8.7

Comfort

8.3

Overall

8.5

Entertainment

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

TPE - SFO

Why when we’re about to board they suddenly announced the letters ABC to board first .. so what is the use us waiting at the door (with wheelchairs) ended up almost at the end to board and I can see people walking boarding first? Is this something new? You go by letters now?

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, EVA Air 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$220, while return flights cost around HK$1,951.

  • How much is a return flight to Illinois?

    A return flight to Illinois will typically cost around HK$1,955, however they can be found for as little as HK$1,955.

  • 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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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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