The cheapest times to fly from ONT to VIE are

  • January 1st to April 1st
  • September 10th to December 16th (except the week of September 17th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ONT to VIE is early to mid January. Prices can be as high as $1959 for Saturday flights during mid December, or as low as $819 for Tuesday flights around early to mid January.


When to Fly to Vienna

Flying from Ontario, CA (ONT) to Vienna (VIE) will usually cost between $828 to $1724 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid January with an average ticket price of $874. Due to high demand the most expensive time to fly is mid December, with an average price of $1604. Planning your trip to low-cost times can easily save you $730 on economy flights and even more on first-class flights. Generally, any price below $1188 can be considered a good price for a round-trip ONT to VIE flight.

See below for a graph of average weekly prices for the ONT to VIE route. All prices are for round-trip tickets in USD.

ONT to VIE Flight Prices

Compared to other flights, the ONT to VIE flight is slightly more expensive than the average and costs less than the average flight leaving from Ontario. The average price per mile (for a direct flight) is $0.12, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $159 (12%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1104. Return trip prices are from the VIE to ONT flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from ONT to VIE can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 11 hour 57 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from ONT to VIE while comparing.

Destination alternative #1: Budapest Liszt Ferenc International Airport (BUD) in Budapest

  • 133 miles (214 km) away from VIE
  • Usually 0.80% less expensive than VIE
  • 2-layover flights available

See ONT to BUD flights


Flight Hacking ONT to VIE

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from ONT to VIE — but Champion Traveler does!

Hack #1: London (ONT > LHR > VIE)

  • Price for both tickets: $765
  • Average savings: $423 (35.62%)

See ONT to LHR flights

Hack #2: Copenhagen (ONT > CPH > VIE)

  • Price for both tickets: $880
  • Average savings: $308 (25.89%)

See ONT to CPH flights

Hack #3: San Francisco, CA (ONT > SFO > VIE)

  • Price for both tickets: $903
  • Average savings: $285 (24%)

See ONT to SFO flights


Flight Questions Answered

Still have questions about flying from ONT to VIE? We’ve got answers.

Which airlines fly this route?

You can find 12 major airlines flying this route most often: Air Canada, Air France, Alaska, American, Austrian, British Airways, Condor, Delta, KLM, Lufthansa, SWISS, United, and potentially more during busy seasons.

How far away is it from Vienna International Airport to Ontario International Airport?

The distance between the two airports is roughly 6093 miles or 9806 kilometers.

How long does it take to fly from ONT to VIE?

The real-world flight time for a nonstop ONT to VIE flight is about 11 hour 57 minutes.

How many flights go between Ontario, CA and Vienna?

It depends on the day of the week and the date, but a typical day might have around 13 available flights from ONT to VIE.


Airport Location Info


Departing Airport

Origination code ONT
Origination airport name Ontario International Airport
City Ontario, CA
Country the United States
Latitude 34.1
Longitude -117.6

Return Airport

Destination code VIE
Destination airport name Vienna International Airport
City Vienna
Country Austria
Latitude 48.1
Longitude 16.6


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.