Cheap Flights to Illinois

View NZ$742 flight on Fri, 6 Mar 2026Opens in a new window

Popular airlines to Illinois

  • Delta

  • Frontier Airlines

  • American Airlines

  • United

  • Southwest Airlines

  • Spirit Airlines

  • Alaska Airlines

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

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

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheapest Flights to Illinois

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, 9 Mar - Sun, 15 Mar
AKL
Auckland
STL
St. Louis
NZ$1,542 Return, found 6 days ago
NZ$1,542
Return
found 6 days ago
Select Air Canada flight, departing Mon, 9 Mar from Auckland to St. Louis, returning Sun, 15 Mar, priced at NZ$1,542 found 6 days ago
Air Canada
Mon, 9 Mar - Sun, 15 Mar
AKL
Auckland
STL
St. Louis
NZ$1,551 Return, found 6 days ago
NZ$1,551
Return
found 6 days ago
Select Air Canada flight, departing Mon, 9 Mar from Auckland to St. Louis, returning Sun, 15 Mar, priced at NZ$1,551 found 6 days ago
Air Canada
Mon, 9 Mar - Sun, 15 Mar
AKL
Auckland
STL
St. Louis
NZ$1,560 Return, found 6 days ago
NZ$1,560
Return
found 6 days ago
Select Air Canada flight, departing Mon, 9 Mar from Auckland to St. Louis, returning Sun, 15 Mar, priced at NZ$1,560 found 6 days ago
Air Canada
Mon, 9 Mar - Sun, 15 Mar
AKL
Auckland
STL
St. Louis
NZ$1,660 Return, found 6 days ago
NZ$1,660
Return
found 6 days ago
Select Air Canada flight, departing Mon, 9 Mar from Auckland to St. Louis, returning Sun, 15 Mar, priced at NZ$1,660 found 6 days ago
Air Canada
Mon, 9 Mar - Sun, 15 Mar
AKL
Auckland
STL
St. Louis
NZ$1,668 Return, found 6 days ago
NZ$1,668
Return
found 6 days ago
Select Air Canada flight, departing Mon, 9 Mar from Auckland to St. Louis, returning Sun, 15 Mar, priced at NZ$1,668 found 6 days ago
United
Wed, 11 Mar - Wed, 11 Mar
AKL
Auckland
ORD
Chicago
NZ$1,693 Return, found 6 days ago
NZ$1,693
Return
found 6 days ago
Select United flight, departing Wed, 11 Mar from Auckland to Chicago, returning Wed, 11 Mar, priced at NZ$1,693 found 6 days ago
Delta
Wed, 4 Mar - Sun, 8 Mar
AKL
Auckland
ORD
Chicago
NZ$1,703 Return, found 5 days ago
NZ$1,703
Return
found 5 days ago
Select Delta flight, departing Wed, 4 Mar from Auckland to Chicago, returning Sun, 8 Mar, priced at NZ$1,703 found 5 days ago
Qantas Airways
Mon, 4 May - Mon, 18 May
AKL
Auckland
ORD
Chicago
NZ$1,903 Return, found 6 days ago
NZ$1,903
Return
found 6 days ago
Select Qantas Airways flight, departing Mon, 4 May from Auckland to Chicago, returning Mon, 18 May, priced at NZ$1,903 found 6 days ago
Delta
Tue, 3 Mar - Tue, 17 Mar
AKL
Auckland
MDW
Chicago
NZ$1,938 Return, found 2 days ago
NZ$1,938
Return
found 2 days ago
Select Delta flight, departing Tue, 3 Mar from Auckland to Chicago, returning Tue, 17 Mar, priced at NZ$1,938 found 2 days ago
American Airlines
Wed, 10 June - Mon, 15 June
AKL
Auckland
ORD
Chicago
NZ$2,094 Return, just found
NZ$2,094
Return
just found
Select American Airlines flight, departing Wed, 10 June from Auckland to Chicago, returning Mon, 15 June, priced at NZ$2,094 just found

The Annual Holiday Sale

Members save up to 40% on hotels and homes. Plan this year’s big trip and save.
Book now

Trending flights to Illinois

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, 9 Mar - Sun, 15 Mar
AKL
Auckland
STL
St. Louis
NZ$1,542 Return, found 6 days ago
NZ$1,542
Return
found 6 days ago
Select Air Canada flight, departing Mon, 9 Mar from Auckland to St. Louis, returning Sun, 15 Mar, priced at NZ$1,542 found 6 days ago

Frequently asked questions

How do I find cheap flights to Illinois that have flexible change policies?
Search for cheap flights to Illinois, then tick the "No change fee" box under the "Flexible change policies" heading. From then on it's smooth sailing. We understand that travel plans change and flexibility is essential, so book with confidence with Expedia.
Which airlines fly to Illinois?
Whether you're travelling somewhere new or rendezvousing at a favourite haunt, these airlines are waiting to take you into or near Illinois:

  • United Airlines - 13 063 flights to or near Illinois each month, including 12 950 flights to O'Hare Intl. Airport (ORD) and 108 flights to Quad City Intl. Airport (MLI) per month.
  • American Airlines - 8 977 flights to or near Illinois each month, including 8 855 flights to O'Hare Intl. Airport (ORD) and 121 flights to Quad City Intl. Airport (MLI) per month.
  • Southwest Airlines - 5 997 flights to or near Illinois each month, including 5 334 flights to Midway Intl. Airport (MDW) and 663 flights to O'Hare Intl. Airport (ORD) per month.

How can I find cheap tickets to Illinois?
One of the easiest ways to find cheap tickets to Illinois is to be flexible with your travel dates. Search for your flights, then click "flexible dates" at the top of your results. It'll reveal the cheapest prices for nearby days. The lowest price for a flight to Illinois in the last seven days was NZ$1,542. Booking well in advance will generally help you score an even bigger bargain.
How much is a flight to Illinois?
There were plenty of bargain fares up for grabs in the last seven days, with the cost of a return airfare to Illinois ranging between NZ$1,542 and NZ$2,094. Many lucky travellers nabbed one-way tickets from Auckland (AKL) for as little as NZ$742.
What are the most popular airports to fly into in Illinois?
Touch down at one of these top Illinois airports and you'll be perfectly placed to discover all that this wonderful region has to offer:

  • O'Hare Intl. Airport (ORD) - 25 318 flights per month.
  • Midway Intl. Airport (MDW) - 5 962 flights per month.
  • Quad City Intl. Airport (MLI) - 325 flights per month.

When is the cheapest time to fly to Illinois?
Take off for Illinois early in the week and you'll usually be rewarded more economical fares. Tuesday is typically the cheapest day to hop on a plane, followed by Monday. If you're hoping to avoid the most expensive flights, steer clear of Saturdays.
How much is a plane ticket to Illinois?
In the last seven days, plane fares to Illinois ranged from NZ$1,542 to NZ$2,094.
What is the best time to go to Illinois?
A terrific time to check out Chicago is after June 20 when the summer season starts. In Illinois's main city, average temperatures range from 18ºC to 24ºC at this time — ideal weather for sightseeing! May, June and August are the most popular months to head to this hot spot.
What months are the cheapest to book a flight to Illinois?
The top month to purchase affordable flights to Illinois is February. Remember that in the U.S, an expensive time to reserve a ticket is during the busy month of December.

Book with confidence

Illinois Flights

There is no better time to steal away to Illinois than right now, and Expedia.co.nz knows just how to get you there without breaking your budget. You can find cheap flights to Illinois right here on Expedia.co.nz, and comparing itineraries couldn't be easier. Whether you are early bird flyer or want to catch Illinois flights on the red-eye schedule, Expedia.co.nz can show you all the available flights at the best price. From domestic flights to international journeys, the flight you need can be found and booked right here with us.

Once you have your cheap tickets to Illinois in hand, holiday planning can move forward full steam ahead. Unleash the potential of your holiday with a car rental, which makes it possible to explore Illinois without relying on public transportation or trekking far and wide on foot.

If you're in the market for adventure, book one of the Expedia holiday packages. Our packages save you money and time by bundling hotels and flights. What are you waiting for? Your next holiday in Illinois starts right here!

Illinois Flights

Travel information

Illinois Flights Information

Airlines serving
Air Canada, Delta, United, American Airlines, Qantas Airways, Air New Zealand
Roundtrip price
from NZ$1,542
Illinois Flights Information

Explore a world of travel with Expedia

*Available to Expedia members.