IAD - STI

$179 Find Cheap Flights from Washington Dulles Airport to Santiago de los Caballeros

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Santiago de los Caballeros departing on 5/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Santiago de los Caballeros

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Santiago de los Caballeros, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Santiago de los Caballeros, as well as popular online travel agencies
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Cheap Flights from Dulles Intl to Santiago de los Caballeros

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Santiago de los Caballeros that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Dulles Intl to Santiago de los Caballeros

KAYAK's recommended round-trip deals from the most popular airlines that fly from Dulles Intl to Santiago de los Caballeros.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
12:23 pm - 12:50 pmIAD-STI
24h 27m1 stop
Frontier Logo
2:10 pm - 11:28 amSTI-IAD
21h 18m1 stop
$359Frontier
Find Deal
Thu, Jun 12 - Wed, Jun 25
Frontier Logo
12:26 pm - 12:51 pmIAD-STI
24h 25m1 stop
Frontier Logo
2:10 pm - 11:56 amSTI-IAD
21h 46m1 stop
$399Frontier
Find Deal
Thu, Jul 24 - Mon, Jul 28
American Airlines Logo
7:25 am - 8:48 pmIAD-STI
13h 23m2 stops
American Airlines Logo
7:00 am - 11:01 pmSTI-IAD
16h 01m2 stops
$469American Airlines
Find Deal
Wed, Aug 6 - Tue, Aug 12
United Airlines Logo
9:00 am - 3:12 pmIAD-STI
6h 12m1 stop
United Airlines Logo
6:00 am - 2:27 pmSTI-IAD
8h 27m1 stop
$491United Airlines
Find Deal
Thu, May 29 - Thu, Jun 5
Delta Logo
5:10 pm - 1:13 amIAD-STI
8h 03m1 stop
Delta Logo
6:20 am - 4:31 pmSTI-IAD
10h 11m1 stop
$495Delta
Find Deal
Thu, Sep 11 - Tue, Sep 16
American Airlines Logo
8:19 pm - 12:31 pmIAD-STI
16h 12m2 stops
American Airlines Logo
1:31 pm - 9:56 amSTI-IAD
20h 25m2 stops
$510American Airlines
Find Deal
Sat, Aug 9 - Mon, Aug 18
Delta Logo
12:30 pm - 7:54 pmIAD-STI
7h 24m1 stop
Delta Logo
6:10 am - 4:31 pmSTI-IAD
10h 21m1 stop
$515Delta
Find Deal
Sat, Oct 4 - Sat, Oct 11
United Airlines Logo
5:35 pm - 1:46 amIAD-STI
8h 11m1 stop
United Airlines Logo
6:00 am - 2:27 pmSTI-IAD
8h 27m1 stop
$580United Airlines
Find Deal
Tue, May 27 - Tue, Jun 3
 Logo
3:13 pm - 10:29 amIAD-STI
19h 16m2 stops
 Logo
11:29 am - 11:20 amSTI-IAD
23h 51m3 stops
Fri, Jun 20 - Tue, Jun 24
 Logo
4:54 pm - 10:29 amIAD-STI
41h 35m3 stops
 Logo
11:29 am - 11:20 amSTI-IAD
23h 51m3 stops
Fri, Jun 20 - Tue, Jun 24
Useful Info

KAYAK's insights & trends for Dulles Intl to Santiago de los Caballeros flights

Get data-powered insights and trends into flights from Dulles Intl to Santiago de los Caballeros to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Santiago de los Caballeros?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Washington Dulles Airport to Santiago de los Caballeros, look for departures on Tuesdays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Santiago de los Caballeros, Saturday is the cheapest day to fly and Tuesday is the most expensive.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros is November, where tickets cost $453 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is $1,071 and $864 respectively.

Good to know

Low seasonAugust
High seasonOctober
Cheapest flight$179
Best time to beat the crowds but there is an average 22% increase in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Washington Dulles Airport to Santiago de los Caballeros

When to book flights from Dulles Intl to Santiago de los Caballeros

Are your dates flexible? Find out the best times to travel from Dulles Intl to Santiago de los Caballeros based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to Santiago de los Caballeros flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros was $179 for a one-way ticket and $359 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Santiago de los Caballeros?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington Dulles Airport and on arrival in Santiago de los Caballeros.

  • Which airports will I be using when flying from Washington Dulles Airport to Santiago de los Caballeros?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Santiago de los Caballeros, also known as Santiago de los Caballeros.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Santiago de los Caballeros?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington Dulles Airport to Santiago de los Caballeros?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Washington Dulles Airport and Santiago de los Caballeros, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Santiago de los Caballeros?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to Santiago de los Caballeros.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Santiago de los Caballeros?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Santiago de los Caballeros from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Santiago de los Caballeros?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Santiago de los Caballeros with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and STI can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Santiago de los Caballeros?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Santiago de los Caballeros from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Dulles Intl to Santiago de los Caballeros

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Santiago de los Caballeros. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to Santiago de los Caballeros? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8696 reviews
6.6Food
7.3Comfort
8.1Crew
7.1Entertainment
7.7Boarding
Airline reviews

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

10.0 ExcellentAnonymous, Apr 2025SFO - HKG
Read more United Airlines reviews

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

Flight was cramped with every seat taken. The food was fine, nothing crazy to write home about. The plane felt dated and needing some TLC, the button for the window shade didn't work and there were no AC outlets to use. When communicating with staff all except one nice lady never seemed happy to help me almost like I was bothering them when asked for things like a glass of water or a snack. The flight was overall fine. It did what was needed which is get me from point A to point B. But it certainly was not special. I don't expect much in economy but I believe economy on a host of other airlines is more memorable and better experience.

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

Liked nothing. As per previous segment it was delay delay delay.

Everything you need to know for your flight from Dulles Intl to Santiago de los Caballeros

Information on your arrival and departure airports

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