Cheap Flights to Illinois

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Chicago (CHI)
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Home North America USA Cheap flights to Illinois, United States

Flights to Illinois in 2021

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
Popular inJanuaryHigh demand for flights, 189% potential price rise
Cheapest inNovemberBest time to find cheap flights, 7% potential price drop
Average price17,231,834 ₫Average for round-trip flights in April 2021
Round-trip from41,384,084 ₫From Ho Chi Minh City to Chicago
One-way from13,333,333 ₫One-way flight from Ho Chi Minh City to Chicago

When is the best time to book a flight to Illinois?

Booking 45 days in advance of your planned departure date is, on average, the best time to get cheap flights to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Which day is cheapest to fly to Illinois?

At the moment, Sunday is the most economical day to take a flight to Illinois. Monday is likely to be the most costly.

What time of day is cheapest to fly to Illinois?

Illinois flights can be made cheaper if you choose a flight in the evening. Booking a flight in the morning will likely mean higher prices.

Cheap flights to Illinois in April, May 2021

The best prices found for ORD flights for April, May
23 Apr - 30 Apr
41,384,084 ₫pp
SGN
Ho Chi Minh City
Multiple Airlines
   
2 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
     
3 STOPS
SGN
Ho Chi Minh City
23 Apr - 30 Apr
42,837,372 ₫pp
SGN
Ho Chi Minh City
Multiple Airlines
     
3 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
     
3 STOPS
SGN
Ho Chi Minh City
23 Apr - 30 Apr
47,197,232 ₫pp
SGN
Ho Chi Minh City
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
     
3 STOPS
SGN
Ho Chi Minh City

Illinois 2021 flight deals

Cheap flights to Illinois found for this year
15 Jun - 14 Sep
18,200,692 ₫pp
SGN
Ho Chi Minh City
ANA
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
ANA
 
1 STOP
SGN
Ho Chi Minh City
15 Jun - 14 Sep
18,592,848 ₫pp
SGN
Ho Chi Minh City
ANA
   
2 STOPS
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
ANA
 
1 STOP
SGN
Ho Chi Minh City
18 Nov - 22 Nov
18,846,598 ₫pp
SGN
Ho Chi Minh City
ANA
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
ANA
 
1 STOP
SGN
Ho Chi Minh City

Alternative, similarly priced destinations

See alternative destinations where airfare is generally forecast to be close to Illinois flight prices.

Find flights to Illinois

Select your preferred flight destination in Illinois from the list below.

Cheapest flights to USA

Not set on Illinois? See the cheapest flights to Vietnam. Airfare prices updated on April 19, 2021.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2021.
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