Cheap Flights from Sion (SIR) to Chicago (ORD)

Popular airlines from Sion (SIR) to Chicago O'Hare Intl. Airport (ORD)

Cheap Flights from Sion to Chicago (SIR-ORD)

Prices were available within the past 7 days and start at for one-way flights and $4,244 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Emirates
Mon, Oct 20 - Mon, Oct 27
SIR
Sion
ORD
Chicago
$4,244 Roundtrip, found 1 hour ago
$4,244
Roundtrip
found 1 hour ago
Select Emirates flight, departing Mon, Oct 20 from Sion to Chicago, returning Mon, Oct 27, priced at $4,244 found 1 hour ago
Emirates
Mon, Oct 20 - Mon, Oct 27
SIR
Sion
ORD
Chicago
$4,580 Roundtrip, found 1 hour ago
$4,580
Roundtrip
found 1 hour ago
Select Emirates flight, departing Mon, Oct 20 from Sion to Chicago, returning Mon, Oct 27, priced at $4,580 found 1 hour ago
Emirates
Fri, Oct 17 - Fri, Oct 24
SIR
Sion
ORD
Chicago
$4,675 Roundtrip, found 3 days ago
$4,675
Roundtrip
found 3 days ago
Select Emirates flight, departing Fri, Oct 17 from Sion to Chicago, returning Fri, Oct 24, priced at $4,675 found 3 days ago
Emirates
Fri, Oct 17 - Fri, Oct 24
SIR
Sion
ORD
Chicago
$4,771 Roundtrip, found 3 days ago
$4,771
Roundtrip
found 3 days ago
Select Emirates flight, departing Fri, Oct 17 from Sion to Chicago, returning Fri, Oct 24, priced at $4,771 found 3 days ago
Emirates
Fri, Oct 17 - Fri, Oct 24
SIR
Sion
ORD
Chicago
$4,838 Roundtrip, found 3 days ago
$4,838
Roundtrip
found 3 days ago
Select Emirates flight, departing Fri, Oct 17 from Sion to Chicago, returning Fri, Oct 24, priced at $4,838 found 3 days ago
Emirates
Fri, Oct 17 - Fri, Oct 24
SIR
Sion
ORD
Chicago
$4,933 Roundtrip, found 3 days ago
$4,933
Roundtrip
found 3 days ago
Select Emirates flight, departing Fri, Oct 17 from Sion to Chicago, returning Fri, Oct 24, priced at $4,933 found 3 days ago
Emirates
Fri, Oct 17 - Fri, Oct 24
SIR
Sion
ORD
Chicago
$5,257 Roundtrip, found 3 days ago
$5,257
Roundtrip
found 3 days ago
Select Emirates flight, departing Fri, Oct 17 from Sion to Chicago, returning Fri, Oct 24, priced at $5,257 found 3 days ago
Emirates
Fri, Oct 17 - Fri, Oct 24
SIR
Sion
ORD
Chicago
$5,419 Roundtrip, found 3 days ago
$5,419
Roundtrip
found 3 days ago
Select Emirates flight, departing Fri, Oct 17 from Sion to Chicago, returning Fri, Oct 24, priced at $5,419 found 3 days ago
Emirates
Mon, Oct 20 - Mon, Oct 27
SIR
Sion
ORD
Chicago
$6,005 Roundtrip, found 1 hour ago
$6,005
Roundtrip
found 1 hour ago
Select Emirates flight, departing Mon, Oct 20 from Sion to Chicago, returning Mon, Oct 27, priced at $6,005 found 1 hour ago
Emirates
Fri, Oct 17 - Fri, Oct 24
SIR
Sion
ORD
Chicago
$6,068 Roundtrip, found 3 days ago
$6,068
Roundtrip
found 3 days ago
Select Emirates flight, departing Fri, Oct 17 from Sion to Chicago, returning Fri, Oct 24, priced at $6,068 found 3 days ago
Flights from Sion (SIR) to Chicago (ORD)
Origin airport
Sion
Destination airport
O'Hare Intl.
Roundtrip price
$4,244
Distance
4432 mi

Sion to Chicago Flights

The cheapest times to fly from Sion to Chicago

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sion to Chicago are during the month of October. You can find some of the cheapest flights from Sion to Chicago with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sion to Chicago

Sunday is one of the best days to book for cheap flights from Sion to Chicago: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sion to Chicago

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sion to Chicago in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sion to Chicago flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sion to Chicago airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Sion Airport (SIR) to O'Hare Intl. Airport (ORD) cost?
Secure a cheap one-way flight or cheap return flight from $4,244 from Sion Airport (SIR) to O'Hare Intl. Airport (ORD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Sion Airport (SIR) to O'Hare Intl. Airport (ORD)?
The cheapest month to fly from SIR to ORD is October, when demand is low. Off-peak season is generally when better flight deals are available between these airports.
What is the cheapest airline that flies from Sion Airport (SIR) to O'Hare Intl. Airport (ORD)?
To find the cheapest airline flying from SIR to ORD, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Sion Airport (SIR) to O'Hare Intl. Airport (ORD)?
You'll have to take a flight with a layover if you're traveling from Sion Airport (SIR) to O'Hare Intl. Airport (ORD). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from SIR to ORD?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sion Airport (SIR) to O'Hare Intl. Airport (ORD)?
To avoid potential delays on the Sion Airport (SIR) to O'Hare Intl. Airport (ORD) route, aim to travel before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Sion Airport (SIR) to O'Hare Intl. Airport (ORD) last-minute?
Last-minute fares from SIR to ORD are usually more expensive. To secure the cheapest rates, start looking for flights as soon as possible. That said, if you can play around with your travel dates, it's possible to find a cheap ticket right before your journey.
Is it cheaper to book a SIR to ORD flight and hotel package?
Securing a SIR to ORD flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our extensive range of stays and then add activities, car rentals and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sion Airport (SIR) to O'Hare Intl. Airport (ORD)?
In most instances, you can cancel or reschedule your SIR to ORD flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you'd like further details, go to our Customer Service portal.

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*Available to One Key members.