SEA - STI

$292 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 6/7. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheap Flight Deals 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.

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Santiago de los Caballeros.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
American Airlines Logo
8:18 pm - 9:10 pmSEA-STI
21h 52m1 stop
American Airlines Logo
7:04 am - 12:07 amSTI-SEA
20h 03m1 stop
$586American Airlines
Find Deal
Thu, Jul 24 - Tue, Jul 29
Delta Logo
7:20 am - 12:42 amSEA-STI
14h 22m1 stop
Delta Logo
9:25 pm - 12:19 pmSTI-SEA
17h 54m2 stops
$587Delta
Find Deal
Sat, Jun 21 - Thu, Jul 10
American Airlines Logo
8:18 pm - 9:10 pmSEA-STI
21h 52m1 stop
American Airlines Logo
7:04 am - 6:11 pmSTI-SEA
14h 07m2 stops
$591American Airlines
Find Deal
Thu, Jul 24 - Tue, Jul 29
American Airlines Logo
8:18 pm - 9:10 pmSEA-STI
21h 52m1 stop
American Airlines Logo
8:15 am - 12:28 amSTI-SEA
19h 13m1 stop
$592American Airlines
Find Deal
Fri, Aug 1 - Sat, Aug 9
American Airlines Logo
8:18 pm - 9:10 pmSEA-STI
21h 52m1 stop
American Airlines Logo
8:15 am - 11:02 pmSTI-SEA
17h 47m2 stops
$597American Airlines
Find Deal
Fri, Aug 1 - Sat, Aug 9
American Airlines Logo
8:18 pm - 12:30 pmSEA-STI
13h 12m1 stop
American Airlines Logo
7:04 am - 12:07 amSTI-SEA
20h 03m1 stop
$608American Airlines
Find Deal
Tue, Jul 22 - Thu, Jul 31
American Airlines Logo
5:40 pm - 12:24 pmSEA-STI
15h 44m2 stops
American Airlines Logo
1:40 pm - 12:44 amSTI-SEA
14h 04m2 stops
$612American Airlines
Find Deal
Wed, Jul 16 - Wed, Aug 6
American Airlines Logo
8:18 pm - 9:10 pmSEA-STI
21h 52m1 stop
American Airlines Logo
7:04 am - 12:07 amSTI-SEA
20h 03m1 stop
$623American Airlines
Find Deal
Thu, Jul 24 - Tue, Jul 29
Delta Logo
7:20 am - 12:42 amSEA-STI
14h 22m2 stops
Delta Logo
6:10 am - 10:22 pmSTI-SEA
19h 12m2 stops
$845Delta
Find Deal
Sat, Jun 21 - Thu, Jul 10
United Airlines Logo
12:20 am - 3:12 pmSEA-STI
11h 52m2 stops
United Airlines Logo
2:07 pm - 8:01 amSTI-SEA
20h 54m2 stops
$1,009United Airlines
Find Deal
Thu, Jul 31 - Sat, Aug 9

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.

What is the cheapest month to fly from Seattle to Santiago de los Caballeros?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Santiago de los Caballeros, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Seattle to Santiago de los Caballeros is January, where tickets cost $517 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,172 and $915 respectively.

Good to know

Low season

January

High season

February

Cheapest flight

$292
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 0% 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 $292 for a one-way ticket and $586 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, Star Alliance, and SkyTeam are the airline alliances operating flights between Seattle and Santiago de los Caballeros, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Santiago de los Caballeros, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Santiago de los Caballeros are Delta and American Airlines. With an average price for the route of $625 and an overall rating of 8.0, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $780 and an overall rating of 7.2.

  • 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.

See more FAQs

Top airlines 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.
8.0
DeltaOverall score based on 7919 reviews
8.2Boarding
8.5Crew
7.9Comfort
7.3Food
7.9Entertainment
Airline reviews

Delta flight was on time, seats were comfortable, and crew was nice.

8.0 ExcellentAnonymous, Apr 2025LAX - DEN
Read more Delta reviews

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

It was an overnight flight and I desperately needed coffee before we landed, but Delta does only one beverage service, and that is shortly after takeoff, not before landing at 5 am.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

After a 5 hour delay waiting at the gate (3 delays adding up) with no clear reason provided, we finally boarded flew 3/4 of the way to Toronto then were turned back to New York. As we neared New York, the pilot declared that it was his fault, something to do with timing and him not being allowed into the country???? How could the airline let his happen? They had hours to prepare and make sure they had a crew available for the flight! We ended up in Toronto a day late with no sleep.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Took off on time and successfully avoided weather that looked to be a problem along the way

There were five broken seats on the plane. The crew was very rude in telling people they had to get off the plane and get a flight the next day. No call for volunteers, but telling people they had to get off. One woman was flying with her elderly mother and daughter and was told she had to leave or all three had to leave. Fortunately, a volunteer offered to stay. The situation was handled poorly.

The flight to Tokyo AA61 took off about two hours late, but then had to turn back. By that time the crew had to be replaced. Then they kept promising to take off in an hour, then in 3, then switch to the next day.

British Airways staff are very polite and willing to help.

Any sort of gluten free snack option would be nice

They lost my luggage and it didn’t get delivered until the next day.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.