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Santiago de los Caballeros

$222+ 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 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STI
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$467
(American Airlines)

One-way from

$222
(Delta)

Popular in

December

Cheapest in

January

Average price

$635
From Washington to Santiago de los Caballeros
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One-way flight from Washington to Santiago de los Caballeros
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Highest demand for flights based on searches. 14% potential increase in price ($125 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($55 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/11. 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.
Sun 11/2312:35 amPDX - STI
2 stops20h 24mDelta
Mon 12/86:35 amSTI - PDX
2 stops21h 40mDelta
Deal found 9/11$472
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Tue 11/2510:45 pmPDX - STI
1 stop20h 11mAmerican Airlines
Tue 12/94:32 pmSTI - PDX
1 stop11h 20mAmerican Airlines
Deal found 9/11$481
This SmartFares deal was found by Cheapflights users on 9/8. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2711:59 pmSEA - STI
1 stop11h 14mJetBlue
Fri 10/312:48 pmSTI - SEA
1 stop12h 36mJetBlue
Deal found 9/8$485
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 12/310:08 pmSEA - STI
1 stop18h 25mAmerican Airlines
Fri 12/124:32 pmSTI - SEA
1 stop10h 44mAmerican Airlines
Deal found 9/9$501
This American Airlines deal was found by Cheapflights users on 9/10. 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 11/2410:45 pmPDX - STI
1 stop12h 47mAmerican Airlines
Mon 12/84:32 pmSTI - PDX
1 stop11h 20mAmerican Airlines
Deal found 9/10$517
This Delta deal was found by Cheapflights users on 9/8. 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.
Sat 9/275:45 pmSEA - STI
2 stops15h 55mDelta
Fri 10/36:11 amSTI - SEA
1 stop19h 14mDelta
Deal found 9/8$520
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:19 pmPDX - STI
1 stop20h 32mUnited Airlines
Mon 12/156:00 amSTI - PDX
1 stop19h 45mUnited Airlines
Deal found 9/10$568
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 11/227:38 pmPDX - STI
2 stops15h 15mUnited Airlines
Sat 12/64:00 pmSTI - PDX
3 stops23h 03mUnited Airlines
Deal found 9/10$582
This Delta deal was found by Cheapflights users on 9/10. 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.
Thu 9/119:58 pmSEA - STI
1 stop11h 42mDelta
Sat 9/208:40 pmSTI - SEA
1 stop16h 35mDelta
Deal found 9/10$585
This American Airlines deal was found by Cheapflights users on 9/8. 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 9/198:51 pmSEA - STI
1 stop12h 36mAmerican Airlines
Fri 9/261:29 pmSTI - SEA
1 stop13h 30mAmerican Airlines
Deal found 9/8$595
This Expedia deal was found by Cheapflights users on 9/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1911:59 pmSEA - STI
1 stop21h 30mJetBlue
Thu 9/253:20 amSTI - SEA
1 stop22h 04mJetBlue
Deal found 9/8$615
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 9/115:47 pmSEA - STI
2 stops15h 40mAmerican Airlines
Sat 9/201:29 pmSTI - SEA
2 stops22h 52mAmerican Airlines
Deal found 9/10$634

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 September 11, 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 2/18

6:25 pm-1:10 pm

2 stops14h 45m

Santiago de los Caballeros

Wed 2/25

4:30 pm-10:46 am

2 stops22h 16m

$454

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Mon 3/9

7:00 am-11:27 pm

1 stop13h 27m

Santiago de los Caballeros

Wed 3/11

6:00 am-9:35 pm

1 stop18h 35m

$467

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Sat 1/10

10:55 pm-12:55 pm

1 stop10h 00m

Santiago de los Caballeros

Sat 1/17

4:35 pm-11:29 pm

1 stop10h 54m

$467

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Sun 11/23

12:35 am-12:59 am

2 stops20h 24m

Santiago de los Caballeros

Mon 12/8

6:35 am-8:45 pm

1 stop18h 10m

$472

PortlandSantiago de los Caballeros

PDX - STI

PDXSTI

Portland

Mon 11/24

12:35 am-12:59 am

2 stops20h 24m

Santiago de los Caballeros

Tue 12/9

6:35 am-8:45 pm

1 stop18h 10m

$472

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Wed 12/3

10:08 pm-3:32 pm

1 stop13h 24m

Santiago de los Caballeros

Fri 12/12

6:04 am-5:51 pm

2 stops15h 47m

$506

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Sat 9/27

5:45 pm-12:40 pm

2 stops15h 55m

Santiago de los Caballeros

Fri 10/3

6:11 am-10:25 pm

1 stop19h 14m

$520

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Thu 2/26

7:20 am-11:54 pm

1 stop12h 34m

Santiago de los Caballeros

Mon 3/2

6:35 am-10:16 pm

1 stop19h 41m

$586

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Thu 2/26

5:43 am-1:10 pm

2 stops27h 27m

Santiago de los Caballeros

Mon 3/2

4:30 pm-11:07 pm

2 stops34h 37m

$632

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Wed 2/18

7:00 am-11:51 pm

2 stops12h 51m

Santiago de los Caballeros

Wed 2/25

6:00 am-8:54 pm

3 stops18h 54m

$658

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 17 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, May is the cheapest month in which you can book a flight from State of Washington to Santiago de los Caballeros (average of $347). Flying from State of Washington to Santiago de los Caballeros in July is currently the most expensive (average of $600). 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 September 11, 2025.

When flying from State of Washington to Santiago de los Caballeros, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 13h 27m. American Airlines provides one of the quickest options available for as low as $467. State of Washington and Santiago de los Caballeros are separated by a distance of 3447 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from State of Washington to Santiago de los Caballeros one-way?

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $222. However, be on the lookout for offers from American Airlines and United Airlines, as they are both options that can get you from State of Washington to Santiago de los Caballeros for a low price.

  • 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 Portland - Santiago de los Caballeros, Seattle/Tacoma Intl - 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, May is the cheapest month in which you can book a flight from State of Washington to Santiago de los Caballeros (average of $347). Flying from State of Washington to Santiago de los Caballeros in July is currently the most expensive (average of $600). 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

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$490Average$769FlexibilityNo cancel feeOn-time71%

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