SEA - STI

$192 Find Cheap Flights from Seattle to Santiago de los Caballeros

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Santiago de los Caballeros departing on 1/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Santiago de los Caballeros

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Santiago de los Caballeros, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Santiago de los Caballeros, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$450
Delta
Sat 2/7Sat 2/14
SEA - STI • 1 stop
Cheapest one-way
$192
Multiple Airlines
Thu 1/8
SEA - STI • 3 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Santiago de los Caballeros!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Santiago de los Caballeros (SEA-STI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Santiago de los Caballeros that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Santiago de los Caballeros

Sat, Feb 7 - Sat, Feb 14
Delta Logo
9:59 pm - 1:04 pm
SEA
-
STI
11h 05m1 stop
Delta Logo
6:39 am - 10:22 pm
STI
-
SEA
19h 43m1 stop
$450Delta
Sat, Feb 7 - Sat, Feb 14
Delta Logo
11:10 pm - 8:34 pm
SEA
-
STI
17h 24m2 stops
Delta Logo
6:39 am - 10:22 pm
STI
-
SEA
19h 43m1 stop
$454Delta
Sat, Feb 7 - Sat, Feb 14
American Airlines Logo
9:45 pm - 3:32 pm
SEA
-
STI
13h 47m2 stops
American Airlines Logo
8:00 am - 9:30 pm
STI
-
SEA
17h 30m2 stops
$509American Airlines
Thu, Mar 5 - Thu, Mar 12
Delta Logo
7:10 am - 1:34 am
SEA
-
STI
14h 24m1 stop
Delta Logo
6:00 am - 10:20 pm
STI
-
SEA
19h 20m1 stop
$513Delta
Fri, Mar 6 - Thu, Mar 12
Delta Logo
11:15 pm - 1:34 am
SEA
-
STI
22h 19m2 stops
Delta Logo
6:00 am - 10:20 pm
STI
-
SEA
19h 20m1 stop
$517Delta
Sun, Feb 8 - Wed, Feb 11
United Airlines Logo
12:57 pm - 11:51 pm
SEA
-
STI
30h 54m3 stops
United Airlines Logo
6:00 am - 12:52 am
STI
-
SEA
22h 52m2 stops
$564United Airlines
Tue, Mar 3 - Thu, Mar 12
Delta Logo
6:10 am - 1:34 am
SEA
-
STI
15h 24m2 stops
Delta Logo
6:00 am - 11:52 pm
STI
-
SEA
20h 52m2 stops
$582Delta
Sun, Feb 8 - Wed, Feb 11
United Airlines Logo
11:45 pm - 2:53 pm
SEA
-
STI
11h 08m1 stop
United Airlines Logo
12:52 pm - 11:19 pm
STI
-
SEA
14h 27m1 stop
$615United Airlines
Fri, Mar 6 - Thu, Mar 12
Delta Logo
11:15 pm - 1:34 am
SEA
-
STI
22h 19m2 stops
Delta Logo
6:00 am - 11:52 pm
STI
-
SEA
20h 52m2 stops
$645Delta
Fri, Mar 6 - Thu, Mar 12
Delta Logo
9:45 pm - 1:04 pm
SEA
-
STI
11h 19m1 stop
Delta Logo
6:00 am - 10:20 pm
STI
-
SEA
19h 20m1 stop
$655Delta
Booking Insights

KAYAK's insights & trends for Seattle to Santiago de los Caballeros flights

Get data-powered insights and trends into flights from Seattle to Santiago de los Caballeros to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between Seattle and Santiago de los Caballeros?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Seattle to Santiago de los Caballeros.

There is just one airline that flies from Seattle to Santiago de los Caballeros direct and that is American Airlines. The best round-trip deal found from American Airlines for the route is $490.

Good to know

Cheapest flight$192
Most popular time to fly and prices are also 12% lower on average.
Flight from Seattle to Santiago de los Caballeros

When to book flights from Seattle to Santiago de los Caballeros

Are your dates flexible? Find out the best times to travel from Seattle to Santiago de los Caballeros based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Santiago de los Caballeros

  • What is the cheapest flight from Seattle to Santiago de los Caballeros?

    In the last 3 days, the lowest price for a flight from Seattle to Santiago de los Caballeros was $192 for a one-way ticket and $450 for a round-trip.

  • Do I need a passport to fly between Seattle and Santiago de los Caballeros?

    Yes

  • Which airports will I be using when flying from Seattle to Santiago de los Caballeros?

    On your way to Santiago de los Caballeros, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Santiago de los Caballeros.

  • Which aircraft models fly most regularly from Seattle to Santiago de los Caballeros?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Santiago de los Caballeros?

    oneworld is the only airline alliance operating flights between Seattle and Santiago de los Caballeros.

  • How does KAYAK find such low prices on flights from Seattle to Santiago de los Caballeros?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Santiago de los Caballeros.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Santiago de los Caballeros?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Santiago de los Caballeros from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Santiago de los Caballeros?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Santiago de los Caballeros with an airline and back to Seattle with another airline. Booking your flights between Seattle and STI can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Santiago de los Caballeros?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Santiago de los Caballeros from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Seattle to Santiago de los Caballeros

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Santiago de los Caballeros. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Santiago de los Caballeros? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 11048 reviews
7.2Comfort
8.0Crew
6.5Food
7.5Boarding
6.9Entertainment
Airline reviews

Gate was overcrowded. Gate agents performed very well. Flight crew was top notch! Efficient & professional & courteous. Both meals not thermalized well. Dinner main dish was actually cold in the center. Almost inedible. Breakfast sandwich was lukewarm.

8.0 ExcellentAnonymous, Dec 2025
BNA - JFK
Read more American Airlines reviews

Gate was overcrowded. Gate agents performed very well. Flight crew was top notch! Efficient & professional & courteous. Both meals not thermalized well. Dinner main dish was actually cold in the center. Almost inedible. Breakfast sandwich was lukewarm.

The boarding was as always, the crew tried their best but not enough. The food was a disaster I had dietary restrictions that were half met because the company did not loaded the food for the flight. The entertainment screen was fine but content was not and also they removed the free messaging option from the flight and they charged 30 dollars for that crappy bandwidth. This flight is not worth the cost and the company is going down on quality.

Not comparable to Qatar Airways services on flights to Doha. Flight attendants provided basic services; I was never recognized by name or as an Executive Platinum member. Restrooms were not kept clean during the flight.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

it was fine, decent flight... dont get food besides cookies or pretzels so not sure why you ask about food. same for entertainment..

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

Waaay too small plane. They also need to up the size of the overhead bins. I would love to keep me 3k with of camera equipment in my hard case baggahe instead of it being thrown into the belly of the plane

Attendants were pleasant and the flight was smooth and relaxed.

A little late at the start but all worked out well.

Everything you need to know for your flight from Seattle to Santiago de los Caballeros

Information on your arrival and departure airports