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Cheap flights from North America to Sidney from $493

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from North America to Sidney departing on 3/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:21 pm - 4:39 pm
SFO
-
SDY
23h 18m2 stops
Multiple Airlines Logo
1:04 pm - 2:01 pm
SDY
-
SFO
49h 57m2 stops
$493Multiple Airlines
Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
1:34 pm - 9:10 am
DEN
-
SDY
19h 36m2 stops
Multiple Airlines Logo
9:45 am - 11:35 pm
SDY
-
DEN
13h 50m2 stops
$565Multiple Airlines
Thu, Jan 22 - Thu, Jan 29

momondo Fare Finder

 
Customize your flight search to find flights from North America to Sidney, Montana that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 27, 2025.
Use the filters below to find and compare flights from North America to Sidney, Montana that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSidney

SFO - SDY

SFOSDY

San Francisco

Mon 3/9

4:21 pm-4:39 pm

2 stops23h 18m

Sidney Richland Municipal

Mon 3/16

1:04 pm-2:01 pm

2 stops49h 57m

$493

DenverSidney

DEN - SDY

DENSDY

Denver Intl

Thu 1/22

1:34 pm-9:10 am

2 stops19h 36m

Sidney Richland Municipal

Thu 1/29

9:45 am-11:35 pm

2 stops13h 50m

$565

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap North America to Sidney, Montana flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from North America to Sidney, Montana

Fastest flight time

7h 49m

Direct flights

None
The fastest flight from North America to Sidney, Montana takes 7h 49m
There are no direct flights from North America to Sidney, Montana. There are no popular flight routes from North America to Sidney, Montana.
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  • When did momondo last update prices for flights from North America to Sidney Richland Municipal Airport?

    Prices for flights from North America to Sidney Richland Municipal Airport refresh daily.

  • How old do you have to be to fly from North America to Sidney Richland Municipal Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from North America to Sidney Richland Municipal Airport.

  • What documentation or ID do you need to fly to Sidney Richland Municipal Airport?

    The travel and health documents you'll need for your trip to Sidney Richland Municipal Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sidney Richland Municipal Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from North America to Sidney, Montana?

  • How do I get Price Alerts for flights from North America to Sidney, Montana?

    Confirm your travel details to search for the latest offers for flights from North America to Sidney, Montana. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from North America to Sidney, Montana with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from North America to Sidney?

Finding the right flight to Sidney from North America is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sidney quick and easy, saving you time and money.

Can I find flights from North America to Sidney with flexible booking policies on momondo?

Yes. All flights to Sidney from North America on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from North America to Sidney?

Once all potential North America to Sidney flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from North America to Sidney right now. Can momondo alert me if prices change?

Price alerts on flights to Sidney from North America are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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