IAD - STI

$189 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 12/8. 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
1 adult, Economy

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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Flight Deals

Cheap Flights from Dulles Intl to Santiago de los Caballeros (IAD-STI)

 
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.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Wed, Nov 12 - Thu, Nov 20
Delta Logo
12:11 pm - 12:59 amIAD-STI
11h 48m1 stop
Delta Logo
9:01 pm - 11:31 amSTI-IAD
15h 30m1 stop
$467Delta
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Thu, Nov 13 - Tue, Nov 18
American Airlines Logo
8:09 pm - 3:33 pmIAD-STI
18h 24m2 stops
American Airlines Logo
4:35 pm - 1:35 pmSTI-IAD
22h 00m2 stops
$482American Airlines
Find Deal
Thu, Nov 13 - Tue, Nov 18
American Airlines Logo
6:24 am - 8:51 pmIAD-STI
13h 27m2 stops
American Airlines Logo
7:00 am - 11:07 pmSTI-IAD
17h 07m2 stops
$483American Airlines
Find Deal
Sat, Oct 18 - Tue, Oct 21
United Airlines Logo
5:12 pm - 1:46 amIAD-STI
8h 34m1 stop
United Airlines Logo
2:07 pm - 9:11 pmSTI-IAD
7h 04m1 stop
$485United Airlines
Find Deal
Tue, Nov 4 - Sun, Nov 9
Delta Logo
7:59 pm - 1:03 pmIAD-STI
16h 04m1 stop
Delta Logo
6:35 am - 7:08 pmSTI-IAD
13h 33m1 stop
$487Delta
Find Deal
Sat, Oct 18 - Tue, Oct 21
American Airlines Logo
8:25 pm - 12:13 pmIAD-STI
15h 48m2 stops
American Airlines Logo
1:14 pm - 9:55 amSTI-IAD
20h 41m2 stops
$489American Airlines
Find Deal
Thu, Dec 4 - Sun, Dec 7
American Airlines Logo
6:25 am - 3:32 pmIAD-STI
8h 07m2 stops
American Airlines Logo
6:00 am - 4:10 pmSTI-IAD
11h 10m2 stops
$497American Airlines
Find Deal
Thu, Dec 4 - Sun, Dec 7
American Airlines Logo
6:25 am - 3:32 pmIAD-STI
8h 07m2 stops
American Airlines Logo
6:00 am - 4:10 pmSTI-IAD
11h 10m2 stops
$500American Airlines
Find Deal
Thu, Oct 9 - Mon, Oct 13
United Airlines Logo
6:15 am - 12:57 pmIAD-STI
6h 42m1 stop
United Airlines Logo
2:07 pm - 10:28 pmSTI-IAD
8h 21m1 stop
$570United Airlines
Find Deal
Thu, Oct 9 - Mon, Oct 13
Multiple Airlines Logo
8:25 am - 10:38 amIAD-STI
26h 13m3 stops
Multiple Airlines Logo
11:43 am - 11:23 amSTI-IAD
23h 40m3 stops
$573Multiple Airlines
Find Deal

Everything you should know

Top airlines
Delta
Cheapest • from $467 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
November
Cheapest • 36% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$467
Overall average: $429
Delta
Wed 11/12Thu 11/20
IAD - STI • 1 stop
Cheapest one-way
$189
Multiple Airlines
Mon 12/8
IAD - STI • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Santiago de los Caballeros!
Booking Insights

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 $429 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $844 and $834 respectively.

Find deals

Good to know

Low seasonSeptember
Cheapest flight$189
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 13% 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 $189 for a one-way ticket and $467 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?

    SkyTeam, oneworld, and Star Alliance 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.

Reviews of the 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 8929 reviews
7.1Entertainment
8.1Crew
7.3Comfort
6.6Food
7.7Boarding
Airline reviews

Great service on board. Boarding a bit slow due to process. Food was pretty average.

8.0 ExcellentTim, Aug 2025IAD - MUC
Read more United Airlines reviews

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

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.

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

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Santiago de los Caballeros (STI)

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