The cheapest times to fly from IAD to STI are
- January 8th to March 25th (except the week of February 12th)
- August 27th to December 9th
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 STI is mid to late September. Prices can be as high as $1199 for Saturday flights during late July, or as low as $448 for Tuesday flights around mid to late September.
When to Fly to Santiago De Los Caballeros
Flying from Washington, DC (IAD) to Santiago (STI) will usually cost between $448 to $821 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 $448. Due to high demand the most expensive time to fly is late July, with an average price of $865. Planning your trip to low-cost times can easily save you $417 on economy flights and even more on first-class flights. Generally, any price below $485 can be considered a good price for a round-trip IAD to STI flight.
See below for a graph of average weekly prices for the IAD to STI route. All prices are for round-trip tickets in USD.
Compared to other flights, the IAD to STI flight is much cheaper than the average and costs much less 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 STI, and Wednesday the cheapest day to fly back into IAD. 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 $108 (15%) 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 $513. Return trip prices are from the STI to IAD flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from IAD to STI can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 3 hour 31 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 IAD to STI while comparing.
- 91 miles (146 km) away from STI
- Usually 7.63% less expensive than STI
- 1-layover flights available
- 124 miles (200 km) away from STI
- Usually 1.55% less expensive than STI
- 1-layover flights available
Flight Questions Answered
Still have questions about flying from IAD to STI? We’ve got answers.
Which airlines fly this route?
You can find 7 major airlines flying this route most often: Air Canada, American, Avianca, COPA, Delta, Seaborne Airlines, United, and potentially more during busy seasons.
How far away is it from Cibao International Airport to Washington Dulles International Airport?
The distance between the two airports is roughly 1411 miles or 2271 kilometers.
How long does it take to fly from IAD to STI?
The real-world flight time for a nonstop IAD to STI flight is about 3 hour 31 minutes.
How many flights go between Washington, DC and Santiago?
It depends on the day of the week and the date, but a typical day might have around 42 available flights from IAD to STI.
Airport Location Info
|Origination airport name||Washington Dulles International Airport|
|Country||the United States|
|Destination airport name||Cibao International Airport|
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.