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Santiago de los Caballeros

$380+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STI
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$471
(Delta)

One-way from

$380
(eDestinos)

Popular in

December

Cheapest in

January

Average price

$730
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. 5% potential increase in price ($43 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 1, 2025.

This Delta deal was found by Cheapflights users on 6/28. 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 11/2311:15 amSEA - STI
1 stop10h 11mDelta
Mon 12/86:45 amSTI - SEA
1 stop16h 44mDelta
Deal found 6/28$471
This American Airlines deal was found by Cheapflights users on 6/29. 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 8/1012:46 amSEA - STI
2 stops17h 02mAmerican Airlines
Thu 8/217:00 amSTI - SEA
1 stop20h 14mAmerican Airlines
Deal found 6/29$484
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/245:30 pmSEA - STI
2 stops13h 20mSpirit Airlines
Wed 7/3010:55 amSTI - SEA
2 stops32h 30mSpirit Airlines
Deal found 6/30$606
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Wed 11/261:20 pmSEA - STI
2 stops21h 33mUnited Airlines
Mon 12/84:00 pmSTI - SEA
2 stops25h 32mUnited Airlines
Deal found 7/1$615
This Mytrip deal was found by Cheapflights users on 6/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/136:40 pmSEA - STI
3 stops35h 35mMultiple Airlines
Wed 8/2010:20 amSTI - SEA
3 stops33h 56mMultiple Airlines
Deal found 6/29$722
This Expedia deal was found by Cheapflights users on 6/28. 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 7/2511:20 pmSEA - STI
2 stops19h 49mJetBlue
Sun 7/275:01 amSTI - SEA
2 stops20h 03mJetBlue
Deal found 6/28$775

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 July 1, 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

Sun 11/23

11:15 am-1:26 am

1 stop10h 11m

Santiago de los Caballeros

Mon 12/8

6:45 am-7:29 pm

1 stop16h 44m

$471

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Sun 8/10

12:46 am-8:48 pm

2 stops17h 02m

Santiago de los Caballeros

Thu 8/21

7:00 am-12:14 am

1 stop20h 14m

$484

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Thu 7/24

5:30 pm-9:50 am

2 stops13h 20m

Santiago de los Caballeros

Wed 7/30

10:55 am-4:25 pm

2 stops32h 30m

$606

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Wed 11/26

1:20 pm-2:53 pm

2 stops21h 33m

Santiago de los Caballeros

Mon 12/8

4:00 pm-1:32 pm

2 stops25h 32m

$615

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Wed 8/13

6:40 pm-9:15 am

3 stops35h 35m

Santiago de los Caballeros

Wed 8/20

10:20 am-5:16 pm

3 stops33h 56m

$722

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Fri 7/25

11:20 pm-10:09 pm

2 stops19h 49m

Santiago de los Caballeros

Sat 7/26

2:17 am-10:04 pm

2 stops22h 47m

$775

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Tue 7/8

3:58 pm-9:50 am

2 stops14h 52m

$380

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Tue 7/8

11:20 pm-7:34 pm

1 stop17h 14m

$395

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

Mon 7/7

12:20 am-3:12 pm

2 stops11h 52m

$968

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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 $629). 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 July 1, 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 July 1, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and JetBlue 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.
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,852 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
JetBlue
7.3
Good
2,919 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Spirit Airlines
6.3
Okay
8,101 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines flying from Seattle to Santiago de los Caballeros round-trip?

    Our cheapest airline available from Seattle to Santiago de los Caballeros is Delta. Our recent data shows that you can find tickets from as low as $471 on this airline. Additional options worth looking into are American Airlines and Spirit Airlines, starting at $484 and $606 round-trip. You may be able to fly from Seattle to Santiago de los Caballeros for 34% less than the average price by searching for these airlines.

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

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $380. JetBlue flights start at $395 while deals on United Airlines start at $968 one-way.

  • 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 $629). 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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Top 2 airlines flying from Seattle to Santiago de los Caballeros

Discover the top 2 airlines 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$399Average$769FlexibilityNo cancel feeOn-time71%
DeltaCheapest$470Average$625FlexibilityNo cancel feeOn-timeN/A

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