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Cheap flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros from $247

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros departing on 7/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:15 am - 12:57 pm
IAD
-
STI
6h 42m
1 stop
United Airlines Logo
2:07 pm - 10:59 pm
STI
-
IAD
8h 52m
1 stop
$550United Airlines
Wed, Sep 16 - Tue, Sep 22
American Airlines Logo
6:14 am - 2:15 pm
IAD
-
STI
8h 01m
2 stops
American Airlines Logo
3:15 pm - 9:55 am
STI
-
IAD
18h 40m
2 stops
$555American Airlines
Thu, Sep 17 - Wed, Sep 23
Delta Logo
7:59 pm - 12:30 pm
IAD
-
STI
16h 31m
1 stop
Delta Logo
7:30 pm - 11:45 am
STI
-
IAD
16h 15m
1 stop
$570Delta
Sat, Aug 29 - Wed, Sep 16
American Airlines Logo
12:30 pm - 2:15 pm
IAD
-
STI
25h 45m
2 stops
American Airlines Logo
3:15 pm - 11:56 am
STI
-
IAD
20h 41m
2 stops
$572American Airlines
Thu, Sep 17 - Wed, Sep 23
American Airlines Logo
6:44 am - 8:49 pm
IAD
-
STI
13h 05m
2 stops
American Airlines Logo
2:32 pm - 11:12 pm
STI
-
IAD
9h 40m
2 stops
$575American Airlines
Tue, Dec 1 - Sat, Jan 16
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
$582Copa Airlines
Wed, Sep 23 - Mon, Sep 28
Delta Logo
12:29 pm - 7:34 pm
IAD
-
STI
7h 05m
1 stop
Delta Logo
6:00 am - 6:33 pm
STI
-
IAD
12h 33m
1 stop
$595Delta
Tue, Aug 4 - Tue, Aug 11
Copa Airlines Logo
6:26 am - 2:59 pm
IAD
-
STI
8h 33m
1 stop
Copa Airlines Logo
4:12 pm - 4:20 am
STI
-
IAD
12h 08m
1 stop
$597Copa Airlines
Thu, Aug 20 - Thu, Sep 3
United Airlines Logo
12:38 pm - 10:52 pm
IAD
-
STI
10h 14m
1 stop
United Airlines Logo
2:07 pm - 10:59 pm
STI
-
IAD
8h 52m
1 stop
$599United Airlines
Wed, Sep 30 - Tue, Oct 13
United Airlines Logo
6:45 am - 12:57 pm
IAD
-
STI
6h 12m
1 stop
United Airlines Logo
2:07 pm - 10:59 pm
STI
-
IAD
8h 52m
1 stop
$600United Airlines
Fri, Oct 16 - Tue, Oct 20

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Copa Airlines flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

Our best Copa Airlines deals on Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros flight tickets
Copa Airlines
Sep 23
IAD4:34 pmWashington, D.C. Dulles Intl
22h 24m
1 stop
STI2:58 pmSantiago de los Caballeros
Sep 28
STI4:12 pmSantiago de los Caballeros
12h 08m
1 stop
IAD4:20 amWashington, D.C. Dulles Intl
$582
Copa Airlines
Aug 20
IAD6:26 amWashington, D.C. Dulles Intl
8h 33m
1 stop
STI2:59 pmSantiago de los Caballeros
Sep 3
STI4:12 pmSantiago de los Caballeros
12h 08m
1 stop
IAD4:20 amWashington, D.C. Dulles Intl
$597
Copa Airlines
Jul 29
IAD2:22 amWashington, D.C. Dulles Intl
12h 37m
1 stop
STI2:59 pmSantiago de los Caballeros
Aug 3
STI4:12 pmSantiago de los Caballeros
12h 09m
1 stop
IAD4:21 amWashington, D.C. Dulles Intl
$664

American Airlines flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros flight tickets
American Airlines
Sep 17
IAD6:14 amWashington, D.C. Dulles Intl
8h 01m
2 stops
STI2:15 pmSantiago de los Caballeros
Sep 23
STI3:15 pmSantiago de los Caballeros
18h 40m
2 stops
IAD9:55 amWashington, D.C. Dulles Intl
$555
American Airlines
Sep 17
IAD12:30 pmWashington, D.C. Dulles Intl
25h 45m
2 stops
STI2:15 pmSantiago de los Caballeros
Sep 23
STI3:15 pmSantiago de los Caballeros
20h 41m
2 stops
IAD11:56 amWashington, D.C. Dulles Intl
$572
American Airlines
Dec 1
IAD6:44 amWashington, D.C. Dulles Intl
13h 05m
2 stops
STI8:49 pmSantiago de los Caballeros
Jan 16
STI2:32 pmSantiago de los Caballeros
9h 40m
2 stops
IAD11:12 pmWashington, D.C. Dulles Intl
$575

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 4, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Wed 9/16

6:15 am-12:57 pm

1 stop6h 42m

Santiago de los Caballeros

Tue 9/22

2:07 pm-10:59 pm

1 stop8h 52m

$550

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Thu 9/17

6:14 am-2:15 pm

2 stops8h 01m

Santiago de los Caballeros

Wed 9/23

3:15 pm-9:55 am

2 stops18h 40m

$555

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Sat 8/29

7:59 pm-12:30 pm

1 stop16h 31m

Santiago de los Caballeros

Wed 9/16

7:30 pm-11:45 am

1 stop16h 15m

$570

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Thu 9/17

12:30 pm-2:15 pm

2 stops25h 45m

Santiago de los Caballeros

Wed 9/23

3:15 pm-11:56 am

2 stops20h 41m

$572

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 12/1

6:44 am-8:49 pm

2 stops13h 05m

Santiago de los Caballeros

Sat 1/16

2:32 pm-11:12 pm

2 stops9h 40m

$575

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Wed 9/23

4:34 pm-2:58 pm

1 stop22h 24m

Santiago de los Caballeros

Mon 9/28

4:12 pm-4:20 am

1 stop12h 08m

$582

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Tue 8/4

12:29 pm-7:34 pm

1 stop7h 05m

Santiago de los Caballeros

Tue 8/11

6:00 am-6:33 pm

1 stop12h 33m

$595

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Thu 8/20

6:26 am-2:59 pm

1 stop8h 33m

Santiago de los Caballeros

Thu 9/3

4:12 pm-4:20 am

1 stop12h 08m

$597

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Wed 9/30

12:38 pm-10:52 pm

1 stop10h 14m

Santiago de los Caballeros

Tue 10/13

2:07 pm-10:59 pm

1 stop8h 52m

$599
Quickest round-trip

Washington, D.C.Santiago de los Caballeros

IAD - STI

IADSTI

Washington, D.C. Dulles Intl

Fri 10/16

6:45 am-12:57 pm

1 stop6h 12m

Santiago de los Caballeros

Tue 10/20

2:07 pm-10:59 pm

1 stop8h 52m

$600

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Santiago de los Caballeros?

The cheapest month to fly to Santiago de los Caballeros from Washington, D.C. Dulles Intl Airport is in September. Flight prices, which tend to average around $153, are often lower during this time because this is during the off-season. If you aren’t able to travel to Santiago de los Caballeros during the month of September, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $467.

When to book flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros (IAD to STI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

Fastest flight time

6h 12m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros takes 6h 12m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros.
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Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

  • How far is Washington, D.C. Dulles Intl to Santiago de los Caballeros by plane?

    A flight from Washington, D.C. Dulles Intl to Santiago de los Caballeros will travel around 1405.2 mi. Typically, this will take 6h 12m by plane in normal conditions.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros Airport are updated daily.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros Airport.

  • What documentation or ID do you need to fly to Santiago de los Caballeros Airport?

    The travel and health documents required for your trip to Santiago de los Caballeros Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Santiago de los Caballeros Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Santiago de los Caballeros with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $467Free CancellationRating
7.4
9,930 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Santiago de los Caballeros?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Santiago de los Caballeros. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to Santiago de los Caballeros with flexible booking policies on momondo?

All flight searches from Washington, D.C. to Santiago de los Caballeros on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Santiago de los Caballeros?

momondo provides multiple filters to help you find the best flight to Santiago de los Caballeros from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington, D.C. to Santiago de los Caballeros right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Santiago de los Caballeros now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Santiago de los Caballeros and let you know when they change.

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