Cheap Flights to Central Illinois from HK$1,121

View HK$1,121 flight on Sat, 10 Jan 2026Opens in a new window

Popular airlines

  • American Airlines

    American Airlines

  • Delta

    Delta

  • Iberia

    Iberia

  • British Airways

    British Airways

  • KLM

    KLM

  • Virgin Atlantic

    Virgin Atlantic

  • Qatar Airways

    Qatar Airways

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Central Illinois

Prices were available within the past 7 days and start at HK$1,121 for one-way flights and HK$2,091 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 13 Feb - Sat, 14 Feb
SEA
Seattle
STL
St. Louis
HK$2,091 Return, found 16 hours ago
HK$2,091
Return
found 16 hours ago
Select Delta flight, departing Fri, 13 Feb from Seattle to St. Louis, returning Sat, 14 Feb, priced at HK$2,091 found 16 hours ago
Delta
Fri, 13 Feb - Sat, 14 Feb
SEA
Seattle
STL
St. Louis
HK$2,295 Return, found 16 hours ago
HK$2,295
Return
found 16 hours ago
Select Delta flight, departing Fri, 13 Feb from Seattle to St. Louis, returning Sat, 14 Feb, priced at HK$2,295 found 16 hours ago
American Airlines
Fri, 13 Feb - Sat, 14 Feb
SEA
Seattle
STL
St. Louis
HK$2,370 Return, found 16 hours ago
HK$2,370
Return
found 16 hours ago
Select American Airlines flight, departing Fri, 13 Feb from Seattle to St. Louis, returning Sat, 14 Feb, priced at HK$2,370 found 16 hours ago
Delta
Fri, 13 Feb - Sat, 14 Feb
SEA
Seattle
STL
St. Louis
HK$2,403 Return, found 16 hours ago
HK$2,403
Return
found 16 hours ago
Select Delta flight, departing Fri, 13 Feb from Seattle to St. Louis, returning Sat, 14 Feb, priced at HK$2,403 found 16 hours ago
United
Tue, 13 Jan - Thu, 15 Jan
ORD
Chicago
STL
St. Louis
HK$3,562 Return, found 1 day ago
HK$3,562
Return
found 1 day ago
Select United flight, departing Tue, 13 Jan from Chicago to St. Louis, returning Thu, 15 Jan, priced at HK$3,562 found 1 day ago

Frequently asked questions

How do I find cheap flights to Central Illinois that have flexible change policies?
Search for low-cost seats to Central Illinois, then select "No change fee" directly below the "Flexible change policies" heading. It's that easy. We appreciate that plans change and flexibility matters, so book with confidence with Expedia.
Which airlines fly to Central Illinois?
A good selection of airlines fly to destinations in or near Central Illinois. Your vacation is just a few clicks away with these carriers:

  • United Airlines - 13,626 flights to or near Central Illinois each month, including 12,950 flights to O'Hare Intl. Airport (ORD) and 585 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • American Airlines - 9,944 flights to or near Central Illinois each month, including 8,855 flights to O'Hare Intl. Airport (ORD) and 789 flights to Lambert-St. Louis Intl. Airport (STL) per month.
  • Southwest Airlines - 8,211 flights to or near Central Illinois each month, including 5,334 flights to Midway Intl. Airport (MDW) and 2,214 flights to Lambert-St. Louis Intl. Airport (STL) per month.

How can I find cheap tickets to Central Illinois?
An excellent strategy for finding cheap airfares is to be flexible with your dates. Begin with searching for your flight to Central Illinois, then click on the "flexible dates" box for a list of prices for nearby days. Another useful tip? Book well in advance. To give you an idea of fares, HK$2,091 was the lowest price for a flight to Central Illinois in the last seven days.
How much is a flight to Central Illinois?
If you were journeying one way from Seattle (SEA), you could've locked in a low-cost fare for HK$1,121 in the last seven days. Round-trip journeys to Central Illinois ranged from only HK$2,091 to HK$7,185 over the same period.
What are the most popular airports to fly into in Central Illinois?
Depending on your airline and final Central Illinois destination, you'll have several well-known airports to pick from. They include:

  • O'Hare Intl. Airport (ORD) - 25,318 flights per month.
  • Midway Intl. Airport (MDW) - 5,962 flights per month.
  • Lambert-St. Louis Intl. Airport (STL) - 4,902 flights per month.

When is the cheapest time to fly to Central Illinois?
Leave early on in the week to land the best fare to Central Illinois. Tuesday is normally the most economical day to fly, with Monday right behind it. Saturday often has the highest ticket prices. This is because a lot of travellers prefer to start their holiday on a weekend.
How much is a plane ticket to Central Illinois?
In the last seven days, plane fares to Central Illinois ranged between HK$2,091 and HK$7,185. Prices tend to go up over time, so find a cheap flight today.
What months are the cheapest to book a flight to Central Illinois?
To score a low-cost flight to Central Illinois, try to book during the month of February when the price of airfares are at their lowest. When do tickets cost the most? In the USA, it's December.

Travel information

Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Return price
HK$2,091

Trending flights to Central Illinois

Prices were available within the past 7 days and start at HK$1,121 for one-way flights and HK$2,091 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

China Airlines
Tue, 14 Apr - Sun, 19 Apr
HKG
Hong Kong SAR
STL
St. Louis
HK$7,185 Return, found 5 days ago
HK$7,185
Return
found 5 days ago
Select China Airlines flight, departing Tue, 14 Apr from Hong Kong SAR to St. Louis, returning Sun, 19 Apr, priced at HK$7,185 found 5 days ago

Explore a world of travel with Expedia

*Available to Expedia members.