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Santiago de los Caballeros

$283+ Cheap flights from Washington to Santiago de los Caballeros (STI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STI
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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Cheap flight deals from Washington to Santiago de los Caballeros

Cheapest flights from Washington to Santiago de los Caballeros
Explore the most affordable flight options available from Washington to Santiago de los Caballeros. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This Delta deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:55 pmSEA - STI
1 stop16h 22mDelta
Thu 1/12:24 pmSTI - SEA
2 stops23h 44mDelta
Deal found 12/22$728
This American Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:06 pmSEA - STI
1 stop18h 58mAmerican Airlines
Thu 1/16:00 amSTI - SEA
1 stop21h 42mAmerican Airlines
Deal found 12/22$798
This American Airlines deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:49 amPDX - STI
2 stops16h 15mAmerican Airlines
Mon 1/56:00 amSTI - PDX
1 stop22h 59mAmerican Airlines
Deal found 12/20$1,121
This Delta deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:30 pmPDX - STI
2 stops19h 47mDelta
Fri 1/28:45 pmSTI - PDX
2 stops20h 02mDelta
Deal found 12/20$1,130
This Delta deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:30 amPDX - STI
2 stops17h 21mDelta
Mon 1/59:59 pmSTI - PDX
2 stops18h 33mDelta
Deal found 12/22$1,314
This United Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/221:55 pmSEA - STI
2 stops17h 51mUnited Airlines
Fri 1/912:52 pmSTI - SEA
2 stops25h 03mUnited Airlines
Deal found 12/21$1,331
This American Airlines deal was found by Cheapflights users on 12/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:06 pmSEA - STI
1 stop18h 58mAmerican Airlines
Fri 1/94:33 pmSTI - SEA
1 stop11h 09mAmerican Airlines
Deal found 12/21$1,426
This American Airlines deal was found by Cheapflights users on 12/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:49 pmPDX - STI
1 stop11h 35mAmerican Airlines
Fri 1/26:00 amSTI - PDX
1 stop22h 59mAmerican Airlines
Deal found 12/20$1,535
This United Airlines deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:00 amSEA - STI
2 stops27h 53mUnited Airlines
Thu 1/112:52 pmSTI - SEA
3 stops27h 55mUnited Airlines
Deal found 12/22$1,983
This Delta deal was found by Cheapflights users on 12/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:10 pmSEA - STI
2 stops21h 07mDelta
Fri 1/96:39 amSTI - SEA
2 stops20h 43mDelta
Deal found 12/22$2,089

Find flight deals from Washington to Santiago de los Caballeros

Keep the following information in mind while searching for Washington to Santiago de los Caballeros flight deals. Data was last updated December 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$450
(Delta)

One-way from

$337
(American Airlines)

Popular in

June

Cheapest in

January

Average price

$992
Provider with most accurate pricing for Seattle/Tacoma Intl-Santiago de los Caballeros flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Santiago de los Caballeros flights.
Search Deals
From Washington to Santiago de los Caballeros
Search Deals
One-way flight from Washington to Santiago de los Caballeros
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington 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, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
Use the filters below to find and compare flights from Washington to Santiago de los Caballeros that are best for you.

Fly from

Washington

Fly to

Santiago de los Caballeros

Route

Depart

Return

Price

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Wed 2/4

9:59 pm-8:34 pm

1 stop18h 35m

Santiago de los Caballeros

Wed 2/11

6:38 am-10:25 pm

1 stop19h 47m

$450

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Fri 2/6

5:00 pm-3:32 pm

2 stops18h 32m

Santiago de los Caballeros

Fri 2/13

2:33 pm-11:42 pm

1 stop13h 09m

$454

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Wed 2/11

11:07 pm-10:05 pm

1 stop18h 58m

Santiago de los Caballeros

Tue 2/24

8:00 am-11:59 pm

1 stop19h 59m

$468

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Tue 2/17

10:55 pm-1:31 pm

1 stop10h 36m

Santiago de los Caballeros

Tue 3/3

8:00 am-11:59 pm

1 stop19h 59m

$468

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Wed 2/4

1:30 pm-1:04 pm

2 stops19h 34m

Santiago de los Caballeros

Wed 2/18

6:39 am-8:25 pm

1 stop17h 46m

$472

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Sat 1/10

6:22 pm-3:32 pm

2 stops17h 10m

Santiago de los Caballeros

Sat 1/17

6:00 am-8:27 pm

2 stops18h 27m

$472

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Wed 2/11

7:00 am-11:51 pm

2 stops12h 51m

Santiago de los Caballeros

Tue 2/24

6:00 am-6:49 pm

2 stops16h 49m

$495

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Mon 1/26

11:05 pm-2:53 pm

1 stop11h 48m

Santiago de los Caballeros

Thu 1/29

12:52 pm-9:49 pm

1 stop12h 57m

$578

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Fri 2/6

12:57 pm-11:51 pm

3 stops30h 54m

Santiago de los Caballeros

Fri 2/13

4:00 pm-11:49 am

2 stops23h 49m

$703

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Tue 1/13

7:00 am-11:51 pm

2 stops12h 51m

Santiago de los Caballeros

Sat 1/17

12:52 pm-9:55 am

2 stops25h 03m

$713

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/23

Showing 1-10 of 15 results
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Best time to book a flight from Washington to Santiago de los Caballeros

Have a flexible travel schedule? Discover the best time to fly to Santiago de los Caballeros from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Santiago de los Caballeros

What is the cheapest month to book a flight from State of Washington to Santiago de los Caballeros?

Currently, June is the cheapest month in which you can book a flight from State of Washington to Santiago de los Caballeros (average of $324). Flying from State of Washington to Santiago de los Caballeros in August is currently the most expensive (average of $507). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WA to STI?

Find hourly flight availability from Washington to Santiago de los Caballeros. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

It’s optimal to fly from State of Washington to Santiago de los Caballeros in the morning. By choosing this option you can save up to 18% on the cost of your flight, compared to a flight in the afternoon.

Related info for your journey

Find useful and relevant information for your journey from Washington to Santiago de los Caballeros. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Santiago de los Caballeros from Washington?

    Most people fly into Santiago de los Caballeros (STI) if they book a flight to Santiago de los Caballeros from Washington. Santiago is conveniently located just 6.8 mi from Santiago de los Caballeros’s city center.

  • How long is the flight from State of Washington to Santiago de los Caballeros?

    A quick flight from State of Washington to Santiago de los Caballeros can take about 18h 35m. Delta provides one of the quickest options available for as low as $450. State of Washington and Santiago de los Caballeros are separated by a distance of 3466 mi. This flight may include one or multiple stops.

  • What are the most popular routes from State of Washington to Santiago de los Caballeros?

    When deciding which route to take from State of Washington to Santiago de los Caballeros consider Seattle/Tacoma Intl - Santiago de los Caballeros, Portland - Santiago de los Caballeros or Spokane - Santiago de los Caballeros as they are the most popular.

  • Can I find deals for flights from Washington to Santiago de los Caballeros that include hotel bookings?

    Yes. In addition to deals on Washington to Santiago de los Caballeros flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Santiago de los Caballeros?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Santiago de los Caballeros.

  • Can I find deals for business class flights from Washington to Santiago de los Caballeros?

    Yes. Cheapflights offers flight deals from Washington to Santiago de los Caballeros by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Santiago de los Caballeros?

    Currently, June is the cheapest month in which you can book a flight from State of Washington to Santiago de los Caballeros (average of $324). Flying from State of Washington to Santiago de los Caballeros in August is currently the most expensive (average of $507). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Santiago de los Caballeros

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Washington to Santiago de los Caballeros

Discover the top airline that operate flights from Washington to Santiago de los Caballeros. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$490Average$796FlexibilityNo cancel feeOn-time71%

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