IAD - STI

$407 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 7/15. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$540
Typical prices: $552-$507
United Airlines
Wed 10/14Wed 10/28
IAD - STI • 1 stop
Cheapest one-way
$407
United Airlines
Wed 7/15
IAD - STI • 1 stop
Top airlines
Delta
Cheapest • from $540 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Santiago de los Caballeros. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Fort Lauderdale (FLL)
Cheapest • Avg $460 (round-trip)
Newark (EWR)
Shortest trip • 7h 33m (one-way)
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 76% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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!
Flight Deals
Booking Insights
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, Oct 14 - Wed, Oct 28
United Airlines Logo
6:45 am - 12:57 pm
IAD
-
STI
6h 12m
1 stop
United Airlines Logo
5:00 am - 4:14 pm
STI
-
IAD
11h 14m
1 stop
$540United Airlines
Thu, Sep 17 - Wed, Sep 23
American Airlines Logo
7:10 pm - 2:15 pm
IAD
-
STI
19h 05m
2 stops
American Airlines Logo
3:15 pm - 8:42 am
STI
-
IAD
17h 27m
2 stops
$545American Airlines
Fri, Aug 21 - Wed, Sep 30
Delta Logo
12:29 pm - 1:55 am
IAD
-
STI
13h 26m
1 stop
Delta Logo
7:16 pm - 11:45 am
STI
-
IAD
16h 29m
1 stop
$560Delta
Thu, Sep 10 - Tue, Sep 15
American Airlines Logo
1:29 pm - 2:15 pm
IAD
-
STI
24h 46m
2 stops
American Airlines Logo
3:15 pm - 5:31 pm
STI
-
IAD
26h 16m
2 stops
$562American Airlines
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
8:33 am - 3:12 pm
IAD
-
STI
6h 39m
1 stop
United Airlines Logo
6:00 am - 4:23 pm
STI
-
IAD
10h 23m
1 stop
$570United Airlines
Wed, Sep 23 - Mon, Sep 28
Copa Airlines Logo
4:34 pm - 2:58 pm
IAD
-
STI
22h 24m
1 stop
Copa Airlines Logo
4:12 pm - 4:20 am
STI
-
IAD
12h 08m
1 stop
$572Copa Airlines
Sat, Dec 5 - Sat, Dec 12
Delta Logo
12:30 pm - 12:55 am
IAD
-
STI
11h 25m
1 stop
Delta Logo
6:40 am - 7:10 pm
STI
-
IAD
13h 30m
1 stop
$580Delta
Thu, Aug 27 - Sun, Aug 30
American Airlines Logo
7:57 am - 9:07 pm
IAD
-
STI
13h 10m
2 stops
American Airlines Logo
3:35 pm - 12:48 pm
STI
-
IAD
21h 13m
2 stops
$588American Airlines
Fri, Aug 21 - Wed, Sep 30
American Airlines Logo
10:27 am - 9:07 pm
IAD
-
STI
10h 40m
2 stops
American Airlines Logo
3:15 pm - 12:59 pm
STI
-
IAD
21h 44m
2 stops
$590American Airlines
Sun, Jul 26 - Mon, Aug 17
Copa Airlines Logo
2:22 am - 2:59 pm
IAD
-
STI
12h 37m
1 stop
Copa Airlines Logo
4:12 pm - 4:21 am
STI
-
IAD
12h 09m
1 stop
$600Copa Airlines
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.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros departing in October.

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 September, where tickets cost $153 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $937 and $858 respectively.

Find deals

Good to know

Low seasonSeptember
Cheapest flight$407
Best time to beat the crowds with an average 77% drop in price.
Most popular time to fly with an average 32% increase in price.
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 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros was $318 for a one-way ticket and $540 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 is the only airline alliance operating flights between Washington Dulles Airport and Santiago de los Caballeros.

  • 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 9830 reviews
6.6Food
7.3Comfort
7.1Entertainment
8.1Crew
7.7Boarding
Airline reviews

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

6.0 GoodEnrique, Jun 2026
IAD - LAX
Read more United Airlines reviews

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

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)