$229 Cheap Flights from Phoenix (PHX) to Sidney (SDY)

View $229 flight on Tue, Jan 13, 2026Opens in a new window

Popular airlines from Phoenix to Sidney, MT (SDY-Sidney-Richland Municipal)

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Cheap Flights from Phoenix to Sidney (PHX-SDY)

Prices were available within the past 7 days and start at $229 for one-way flights and $409 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Mar 3 - Tue, Mar 17
PHX
Phoenix
SDY
Sidney
$409 Roundtrip, found 20 hours ago
$409
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Mar 3 from Phoenix to Sidney, returning Tue, Mar 17, priced at $409 found 20 hours ago
Hawaiian Airlines
Sat, Jan 17 - Sat, Jan 31
PHX
Phoenix
SDY
Sidney
$431 Roundtrip, found 20 hours ago
$431
Roundtrip
found 20 hours ago
Select Hawaiian Airlines flight, departing Sat, Jan 17 from Phoenix to Sidney, returning Sat, Jan 31, priced at $431 found 20 hours ago
Hawaiian Airlines
Tue, Apr 7 - Wed, Apr 8
PHX
Phoenix
SDY
Sidney
$432 Roundtrip, found 2 days ago
$432
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Apr 7 from Phoenix to Sidney, returning Wed, Apr 8, priced at $432 found 2 days ago
Delta
Tue, Jan 27 - Tue, Feb 10
PHX
Phoenix
SDY
Sidney
$448 Roundtrip, found 2 hours ago
$448
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Jan 27 from Phoenix to Sidney, returning Tue, Feb 10, priced at $448 found 2 hours ago
Hawaiian Airlines
Fri, Jan 16 - Sat, Jan 31
PHX
Phoenix
SDY
Sidney
$459 Roundtrip, found 20 hours ago
$459
Roundtrip
found 20 hours ago
Select Hawaiian Airlines flight, departing Fri, Jan 16 from Phoenix to Sidney, returning Sat, Jan 31, priced at $459 found 20 hours ago
Hawaiian Airlines
Sat, Jan 24 - Tue, Feb 10
PHX
Phoenix
SDY
Sidney
$468 Roundtrip, found 2 hours ago
$468
Roundtrip
found 2 hours ago
Select Hawaiian Airlines flight, departing Sat, Jan 24 from Phoenix to Sidney, returning Tue, Feb 10, priced at $468 found 2 hours ago
Hawaiian Airlines
Wed, Jan 7 - Sat, Jan 17
PHX
Phoenix
SDY
Sidney
$469 Roundtrip, found 20 hours ago
$469
Roundtrip
found 20 hours ago
Select Hawaiian Airlines flight, departing Wed, Jan 7 from Phoenix to Sidney, returning Sat, Jan 17, priced at $469 found 20 hours ago
Alaska Airlines
Tue, Apr 7 - Wed, Apr 15
PHX
Phoenix
SDY
Sidney
$471 Roundtrip, found 2 days ago
$471
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Apr 7 from Phoenix to Sidney, returning Wed, Apr 15, priced at $471 found 2 days ago
Alaska Airlines
Tue, Jan 27 - Sat, Feb 7
PHX
Phoenix
SDY
Sidney
$472 Roundtrip, found 2 hours ago
$472
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Tue, Jan 27 from Phoenix to Sidney, returning Sat, Feb 7, priced at $472 found 2 hours ago
Hawaiian Airlines
Thu, Jan 22 - Tue, Feb 10
PHX
Phoenix
SDY
Sidney
$478 Roundtrip, found 2 hours ago
$478
Roundtrip
found 2 hours ago
Select Hawaiian Airlines flight, departing Thu, Jan 22 from Phoenix to Sidney, returning Tue, Feb 10, priced at $478 found 2 hours ago

Alternative airports near Sidney

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Sidney-Richland Municipal SDY. Cheapest and Closest option available. Average driving time to city center is 3 minutes. Flights from $533
SDY
Sidney-Richland Municipal
CheapestClosest
Average driving time to city center3 min
Flights from $533

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY) cost?
Get a cheap one-way flight from $229 or cheap return flight from $409 from Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY) 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 Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY)?
The cheapest month to fly from PHX to SDY is March, when demand is low. Off-peak months are often when better flight deals are available between these airports.
What is the cheapest airline that flies from Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from PHX to SDY. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY)?
You'll need to hop on a flight with a layover when traveling from Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from PHX to SDY?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change depending on various factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY)?
Select a flight from Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY) last-minute?
Booking your ticket from PHX to SDY right before your journey is generally more expensive. However, if you're flexible with your itinerary, you could bag a cheap last-minute fare.
Is it cheaper to book a PHX to SDY flight and hotel package?
Booking a PHX to SDY flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our extensive range of accommodations and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Sidney-Richland Municipal Airport (SDY)?
If you reserved your PHX to SDY flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

Travel information

Origin airport
Sky Harbor Intl.
Destination airport
Sidney-Richland Municipal
Roundtrip price
$408
Distance
1067 mi

Book with confidence

Phoenix to Sidney Flights

The cheapest times to fly from Phoenix to Sidney

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 Phoenix to Sidney are during the month of March. You can find some of the cheapest flights from Phoenix to Sidney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Sidney

Sunday is one of the best days to book for cheap flights from Phoenix to Sidney: 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 Phoenix to Sidney

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 Phoenix to Sidney in 2026. You can also book with separate airlines for your outbound and return journeys, from $229 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 Phoenix to Sidney 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 Phoenix to Sidney 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.

 

Phoenix to Sidney Flights

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