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Santiago de los Caballeros

$265+ Cheap flights from Seattle (SEA) 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 1/10. 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 Seattle to Santiago de los Caballeros

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Santiago de los Caballeros (STI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$449
(Delta)

One-way from

$265
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$635
From Seattle/Tacoma Intl to Santiago de los Caballeros
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One-way flight from Seattle/Tacoma Intl 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 Seattle to Santiago de los Caballeros

Cheapest flights from Seattle to Santiago de los Caballeros
Explore the most affordable flight options available from Seattle to Santiago de los Caballeros. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

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 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 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
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.
Fri 9/1211:11 pmSEA - STI
2 stops17h 00mDelta
Sat 9/208:40 pmSTI - SEA
2 stops20h 24mDelta
Deal found 9/10$657

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 Seattle to Santiago de los Caballeros that are best for you.

Fly from

Seattle

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

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

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Sat 1/10

10:57 pm-9:24 pm

1 stop18h 27m

$265

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Sat 1/10

12:25 pm-11:46 am

2 stops19h 21m

$271

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Best time to book a flight from Seattle to Santiago de los Caballeros

Have a flexible travel schedule? Discover the best time to fly to Santiago de los Caballeros from Seattle 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 Seattle to Santiago de los Caballeros

What is the cheapest month to book a flight from Seattle to Santiago de los Caballeros?

Currently, May is the cheapest month in which you can book a flight from Seattle to Santiago de los Caballeros (average of $347). Flying from Seattle 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 SEA to STI?

Find hourly flight availability from Seattle 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.

It’s typically best to fly out from Seattle to Santiago de los Caballeros in the morning. Doing so could potentially save you 19% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing Santiago de los Caballeros

Get insights into the airlines that provide service to Santiago de los Caballeros. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Santiago de los Caballeros. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown American Airlines from Seattle to Santiago de los Caballeros. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

Crew

8.0

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

Crew

8.0

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

Related info for your journey

Find useful and relevant information for your journey from Seattle 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.

  • How long is the flight from Seattle to Santiago de los Caballeros?

    There are many flights that can get you from Seattle to Santiago de los Caballeros in 14h 45m. Fly via American Airlines or Delta to get the fastest option. The distance between Seattle and Santiago de los Caballeros is about 3466 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Seattle to Santiago de los Caballeros round-trip?

    Our cheapest airline available from Seattle to Santiago de los Caballeros is American Airlines. Our recent data shows that you can find tickets from as low as $490 on this airline. You may be able to fly from Seattle to Santiago de los Caballeros for 34% less than the average price by searching for this airline.

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

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

  • How can I find direct flights from Seattle 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 Seattle to Santiago de los Caballeros.

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

    Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Santiago de los Caballeros?

    Currently, May is the cheapest month in which you can book a flight from Seattle to Santiago de los Caballeros (average of $347). Flying from Seattle 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Seattle to Santiago de los Caballeros

Discover the top airline that operate flights from Seattle 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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