The cheapest times to fly from IAD to RIA are

  • March 5th to March 25th
  • April 9th to June 10th
  • August 6th to November 11th (except the week of October 22nd)

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 IAD to RIA is mid to late September. Prices can be as high as $4297 for Friday flights during early to mid July, or as low as $1256 for Tuesday flights around mid to late September.


When to Fly to Santa Maria

Flying from Washington, DC (IAD) to Santa Maria (RIA) will usually cost between $1434 to $2820 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late September with an average ticket price of $1460. Due to high demand the most expensive time to fly is early to mid July, with an average price of $2777. Planning your trip to low-cost times can easily save you $1317 on economy flights and even more on first-class flights. Generally, any price below $1703 can be considered a good price for a round-trip IAD to RIA flight.

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

IAD to RIA Flight Prices

Compared to other flights, the IAD to RIA flight is more expensive than the average and costs slightly more than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.21, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to RIA. Fridays are the most expensive days to fly to Santa Maria. Selecting flights on the least expensive days could save you up to $326 (14%) 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 $1613. Return trip prices are from the RIA to IAD flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from IAD to RIA can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 9 hour 57 minutes may not be realistic.


Flight Hacking IAD to RIA

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 IAD to RIA — but Champion Traveler does!

Hack #1: Porto Alegre (IAD > POA > RIA)

  • Price for both tickets: $1285
  • Average savings: $418 (24.52%)

See IAD to POA flights

Hack #2: Miami, FL (IAD > MIA > RIA)

  • Price for both tickets: $1576
  • Average savings: $127 (7.46%)

See IAD to MIA flights


Flight Questions Answered

Still have questions about flying from IAD to RIA? We’ve got answers.

Which airlines fly this route?

You can find 6 major airlines flying this route most often: Aerolineas Argentinas, Avianca, Azul, COPA, LATAM, United, and potentially more during busy seasons.

How far away is it from Santa Maria Airport to Washington Dulles International Airport?

The distance between the two airports is roughly 4984 miles or 8021 kilometers.

How long does it take to fly from IAD to RIA?

The real-world flight time for a nonstop IAD to RIA flight is about 9 hour 57 minutes.

How many flights go between Washington, DC and Santa Maria?

It depends on the day of the week and the date, but a typical day might have around 20 available flights from IAD to RIA.


Airport Location Info


Departing Airport

Origination code IAD
Origination airport name Washington Dulles International Airport
City Washington, DC
Country the United States
Latitude 38.9
Longitude -77.5

Return Airport

Destination code RIA
Destination airport name Santa Maria Airport
City Santa Maria
Country Brazil
Latitude -29.7
Longitude -53.7


Other Resources

Flights from RIA

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.