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Cheap flights from the United States to Sidney from $405

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Sidney departing on 1/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from the United States to Sidney

Recent round-trip flight deals from the United States to Sidney

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:57 am - 7:51 pm
SFO
-
SDY
10h 54m2 stops
Multiple Airlines Logo
7:35 am - 7:43 pm
SDY
-
SFO
13h 08m2 stops
$405Multiple Airlines
Mon, Jan 19 - Mon, Jan 26
Multiple Airlines Logo
2:56 pm - 9:10 am
LAX
-
SDY
17h 14m2 stops
Multiple Airlines Logo
7:35 am - 9:50 pm
SDY
-
LAX
15h 15m2 stops
$515Multiple Airlines
Sun, Feb 8 - Sat, Feb 28
Multiple Airlines Logo
4:56 pm - 9:10 am
LAX
-
SDY
15h 14m2 stops
Multiple Airlines Logo
7:35 am - 9:36 pm
SDY
-
LAX
15h 01m2 stops
$817Multiple Airlines
Mon, Jan 5 - Fri, Jan 9
Multiple Airlines Logo
12:12 pm - 9:10 am
DEN
-
SDY
20h 58m2 stops
Multiple Airlines Logo
7:35 am - 11:35 pm
SDY
-
DEN
16h 00m2 stops
$921Multiple Airlines
Mon, Jan 5 - Fri, Jan 9

momondo Fare Finder

 
Customize your flight search to find flights from United States 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 23, 2025.
Use the filters below to find and compare flights from the United States to Sidney, Montana that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSidney

SFO - SDY

SFOSDY

San Francisco

Mon 1/19

7:57 am-7:51 pm

2 stops10h 54m

Sidney Richland Municipal

Mon 1/26

7:35 am-7:43 pm

2 stops13h 08m

$405

Los AngelesSidney

LAX - SDY

LAXSDY

Los Angeles

Sun 2/8

2:56 pm-9:10 am

2 stops17h 14m

Sidney Richland Municipal

Sat 2/28

7:35 am-9:50 pm

2 stops15h 15m

$515

Los AngelesSidney

LAX - SDY

LAXSDY

Los Angeles

Mon 1/5

4:56 pm-9:10 am

2 stops15h 14m

Sidney Richland Municipal

Fri 1/9

7:35 am-9:36 pm

2 stops15h 01m

$817

DenverSidney

DEN - SDY

DENSDY

Denver Intl

Mon 1/5

12:12 pm-9:10 am

2 stops20h 58m

Sidney Richland Municipal

Fri 1/9

7:35 am-11:35 pm

2 stops16h 00m

$921

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from United States to Sidney, Montana

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

How often are flights from the United States to Sidney delayed?

Historically, on average around 0% of flights between United States and Sidney have experienced a delay on any given week. The average delay length over the past 12 months has been 0 minutes.

What is the most punctual flight time for the United States to Sidney flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Friday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Cheap United States to Sidney, Montana flight deals and tips

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

Fastest flight time

7h 49m

Direct flights

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

    Prices for flights from United States to Sidney Richland Municipal Airport are refreshed on a daily basis.

  • How old do you have to be to fly from United States 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 United States 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 United States to Sidney, Montana?

Why use momondo?

Why should I use momondo to find a flight deal from United States to Sidney?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from United States to Sidney. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from United States to Sidney with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for United States to Sidney flights to just show those with flexible booking policies.

How can momondo help me find flights from United States to Sidney?

momondo provides multiple filters to help you find the best flight to Sidney from United States. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Sidney from United States 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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Thu 1/22
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