SEA - STI

$312 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 11/25. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$658
American Airlines
Thu 11/26Tue 12/15
SEA - STI • 1 stop
Cheapest one-way
$312
Delta
Wed 11/25
SEA - STI • 2 stops
Top airlines
Cheapest • from $658 (round-trip)
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Santiago de los Caballeros. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $490 (round-trip)
Shortest trip • 10h 54m (one-way)
Insights
Insights
Insights
Insights
Start a new search
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

Thu, Nov 26 - Tue, Dec 15
American Airlines Logo
10:08 pm - 8:49 pm
SEA
-
STI
18h 41m
1 stop
American Airlines Logo
7:00 am - 11:16 pm
STI
-
SEA
20h 16m
1 stop
$658American Airlines
Tue, Sep 15 - Thu, Sep 24
American Airlines Logo
5:02 pm - 2:15 pm
SEA
-
STI
18h 13m
2 stops
American Airlines Logo
3:15 pm - 11:52 pm
STI
-
SEA
11h 37m
1 stop
$663American Airlines
Thu, Nov 26 - Tue, Dec 15
American Airlines Logo
11:59 pm - 8:49 pm
SEA
-
STI
16h 50m
2 stops
American Airlines Logo
7:00 am - 8:56 pm
STI
-
SEA
17h 56m
2 stops
$673American Airlines
Tue, Sep 15 - Thu, Sep 24
United Airlines Logo
10:58 pm - 12:57 pm
SEA
-
STI
10h 59m
1 stop
United Airlines Logo
6:00 am - 9:55 pm
STI
-
SEA
18h 55m
1 stop
$693United Airlines
Thu, Oct 1 - Mon, Oct 12
American Airlines Logo
5:34 pm - 2:15 pm
SEA
-
STI
17h 41m
2 stops
American Airlines Logo
1:40 pm - 11:25 pm
STI
-
SEA
12h 45m
1 stop
$696American Airlines
Thu, Oct 1 - Mon, Oct 12
American Airlines Logo
5:34 pm - 2:15 pm
SEA
-
STI
17h 41m
2 stops
American Airlines Logo
1:40 pm - 11:25 pm
STI
-
SEA
12h 45m
1 stop
$706American Airlines
Sat, Sep 26 - Wed, Sep 30
JetBlue Logo
9:40 pm - 10:47 am
SEA
-
STI
10h 07m
1 stop
JetBlue Logo
6:30 am - 10:38 pm
STI
-
SEA
19h 08m
1 stop
$724JetBlue
Thu, Oct 1 - Mon, Oct 12
American Airlines Logo
8:50 pm - 2:15 pm
SEA
-
STI
14h 25m
1 stop
American Airlines Logo
1:40 pm - 11:25 pm
STI
-
SEA
12h 45m
1 stop
$728American Airlines
Thu, Oct 1 - Mon, Oct 12
Delta Logo
3:55 pm - 12:40 pm
SEA
-
STI
17h 45m
1 stop
Delta Logo
7:16 pm - 10:35 am
STI
-
SEA
18h 19m
1 stop
$734Delta
Thu, Oct 1 - Mon, Oct 12
American Airlines Logo
8:50 pm - 2:15 pm
SEA
-
STI
14h 25m
1 stop
American Airlines Logo
1:40 pm - 11:25 pm
STI
-
SEA
12h 45m
1 stop
$738American Airlines
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 provide the cheapest flights from Seattle to Santiago de los Caballeros?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Seattle to Santiago de los Caballeros were found on American Airlines ($658) and United Airlines ($693).

Good to know

Cheapest flight$312
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 5 days, the lowest price for a flight from Seattle to Santiago de los Caballeros was $312 for a one-way ticket and $658 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.
7.1
American AirlinesOverall score based on 11672 reviews
7.2Comfort
6.4Food
7.5Boarding
7.9Crew
6.8Entertainment
Airline reviews

Flight was delayed due to connecting passengers. Lack of snack options bad. Sitting in Aisle, last cart run pulled the cart directly into my knee. Rude awakening.

8.0 ExcellentWilliam, Jun 2026
DFW - ALB
Read more American Airlines reviews

Flight was delayed due to connecting passengers. Lack of snack options bad. Sitting in Aisle, last cart run pulled the cart directly into my knee. Rude awakening.

We sat on plane at gate delayed without communication as to why we were just sitting there

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

Trash. Sat on the runway for 40 mins…missed connecting flight because of it now I’m stuck. Thanks…a whole fkn lot.

The flight was delayed significantly and we sat on runway after landing for awhile. Best thing was the flight attendant, Jenny, in first class, who was very professional and attentive. She was excellent - the rest of the flight was not.

Crew were professional and kind. The flight was smooth. But... The internet, which we paid 35 dollars for, did not work for most of the flight. This made providing media for our child an uncomfortable hassle.

Overall fine. Seemed like one of the older model planes? Crew was mostly very kind, though some of the female attendants were a rather abrupt during the food service.

Awfully rude American worker at door when we started boarding flight. Then, walk into a blazing hot airplane with no air conditioning until twenty minutes into the flight. Free entertainment was non existent! My husband, along with the fellow passenger in our row, and I could not get entertainment to work, no WIFI! Really?? Been flying American a long time. Was very disappointed.

Flight was delayed by 6 hours... the level of incompetence was truly astounding. I won't be flying American Airlines again. I don't care if AA is direct and there is a layover with another airline, I'll take the layover.

Leave on time. We waited on the plane for hour hours and it was hot and smelly

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

Information on your arrival and departure airports