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Santiago de los Caballeros

$201+ 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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STI
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap 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 December 15, 2025.

This American Airlines deal was found by Cheapflights users on 12/13. 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 12/1912:43 pmSEA - STI
1 stop21h 41mAmerican Airlines
Thu 12/256:57 amSTI - SEA
1 stop20h 47mAmerican Airlines
Deal found 12/13$938
This American Airlines deal was found by Cheapflights users on 12/15. 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 12/1812:43 pmSEA - STI
1 stop21h 41mAmerican Airlines
Fri 1/96:00 amSTI - SEA
2 stops13h 34mAmerican Airlines
Deal found 12/15$997
This Delta deal was found by Cheapflights users on 12/15. 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 12/197:20 amSEA - STI
1 stop13h 38mDelta
Thu 12/256:25 amSTI - SEA
2 stops21h 06mDelta
Deal found 12/15$1,001
This American Airlines deal was found by Cheapflights users on 12/15. 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 stop12h 18mAmerican Airlines
Fri 1/96:00 amSTI - SEA
2 stops15h 45mAmerican Airlines
Deal found 12/15$1,113
This Delta deal was found by Cheapflights users on 12/13. 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 12/182:25 pmSEA - STI
1 stop18h 34mDelta
Fri 1/96:39 amSTI - SEA
1 stop19h 46mDelta
Deal found 12/13$1,115
This Delta deal was found by Cheapflights users on 12/13. 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 12/2211:36 amSEA - STI
1 stop11h 15mDelta
Fri 1/96:39 amSTI - SEA
1 stop19h 46mDelta
Deal found 12/13$1,183

Find 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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$450
(Delta)

One-way from

$201
(Trip.com)

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 Seattle/Tacoma Intl to Santiago de los Caballeros
Search Deals
One-way flight from Seattle/Tacoma Intl 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 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 December 15, 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

Tue 3/3

7:10 am-1:34 am

1 stop14h 24m

Santiago de los Caballeros

Thu 3/12

6:00 am-10:20 pm

1 stop19h 20m

$450

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Wed 2/18

9:55 pm-8:34 pm

1 stop18h 39m

Santiago de los Caballeros

Fri 2/27

6:39 am-10:22 pm

1 stop19h 43m

$450

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Sat 2/21

7:10 am-1:34 am

1 stop14h 24m

Santiago de los Caballeros

Fri 2/27

6:39 am-10:22 pm

1 stop19h 43m

$450

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Mon 2/23

9:55 pm-1:04 pm

1 stop11h 09m

Santiago de los Caballeros

Fri 2/27

6:39 am-10:22 pm

1 stop19h 43m

$450

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Sat 2/7

9:59 pm-1:04 pm

1 stop11h 05m

Santiago de los Caballeros

Sat 2/14

6:39 am-10:22 pm

1 stop19h 43m

$450

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Sat 2/21

7:10 am-1:34 am

1 stop14h 24m

Santiago de los Caballeros

Wed 2/25

9:59 pm-11:19 am

1 stop17h 20m

$450

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Wed 3/4

5:30 am-1:04 pm

2 stops27h 34m

Santiago de los Caballeros

Thu 3/12

6:00 am-10:20 pm

1 stop19h 20m

$454

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Mon 2/23

4:40 pm-8:34 pm

2 stops23h 54m

Santiago de los Caballeros

Wed 2/25

9:59 pm-11:19 am

1 stop17h 20m

$454

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Tue 2/17

9:55 pm-8:34 pm

1 stop18h 39m

Santiago de los Caballeros

Fri 2/27

9:59 pm-7:38 pm

2 stops25h 39m

$454

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Fri 2/20

11:15 pm-1:34 am

2 stops22h 19m

Santiago de los Caballeros

Thu 2/26

6:39 am-11:12 pm

2 stops20h 33m

$454

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 20 results
1
2

Compare providers for flights from Seattle to Santiago de los Caballeros

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Santiago de los Caballeros in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Santiago de los Caballeros flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Santiago de los Caballeros flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Santiago de los Caballeros flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Santiago de los Caballeros flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Santiago de los Caballeros flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, June is the cheapest month in which you can book a flight from Seattle to Santiago de los Caballeros (average of $324). Flying from Seattle 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 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 December 15, 2025.

It’s typically best to fly out from Seattle to Santiago de los Caballeros in the morning. Doing so could potentially save you 30% on the flight price compared to flying in the afternoon, 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 December 15, 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
11,052 reviews

Crew

8.0

Boarding

7.5

Overall

7.2

Entertainment

6.9

Comfort

7.2

Food

6.5

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
American Airlines
7.2
Good
11,052 reviews
American Airlines
7.2
Good
11,052 reviews

Crew

8.0

Boarding

7.5

Overall

7.2

Entertainment

6.9

Comfort

7.2

Food

6.5

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

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 24m. Fly via Delta to get the fastest option. The distance between Seattle and Santiago de los Caballeros is about 3466 mi.

  • 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 35% 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, June is the cheapest month in which you can book a flight from Seattle to Santiago de los Caballeros (average of $324). Flying from Seattle 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

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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$490Average$796FlexibilityNo cancel feeOn-time71%

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