Cheap Flights from Oslo (OSL) to Siena (SAY)

Popular airlines from Gardermoen Airport (OSL) to Ampugnano Airport (SAY)

Frequently asked questions

How much does a flight from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano) cost?
Get a cheap one-way flight or cheap return flight from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano)?
Traveling in can help you save, as it's the cheapest month for flights between OSL and SAY. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from OSL to SAY. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano)?
You'll have to book a flight with a layover when traveling from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from OSL to SAY?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* But this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano)?
Opt for a flight from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano) that leaves before 3 PM to reduce the likelihood of delays. Later departures 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 Gardermoen Airport (OSL) to Siena (SAY-Ampugnano) last-minute?
Booking your plane ticket from OSL to SAY just before your getaway is generally more expensive. But if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Can I cancel or change the date of my flight from Gardermoen Airport (OSL) to Siena (SAY-Ampugnano)?
Typically, you're able to reschedule or cancel your OSL to SAY flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like further details, head to our Customer Service portal.

Travel information

Origin airport
Gardermoen
Destination airport
Ampugnano
Distance
1170 mi

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Oslo to Siena Flights

The cheapest times to fly from Oslo to Siena

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

 

The best time to book a flight from Oslo to Siena

Sunday is one of the best days to book for cheap flights from Oslo to Siena: 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 Oslo to Siena

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 Oslo to Siena 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 Oslo to Siena 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 Oslo to Siena 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.

 

Oslo to Siena Flights

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*Available to One Key members.