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 $215. JetBlue flights start at $572 while deals on United Airlines start at $786 one-way.

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

Travelers seeking maximum savings on their Seattle to Santiago de los Caballeros flight should consider departing on Tuesday evenings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Seattle to Santiago de los Caballeros?

Thursday flights are generally found to be more expensive for flights from Seattle to Santiago de los Caballeros. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Santiago de los Caballeros.

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

January is one of the best times of the year to fly to Santiago de los Caballeros from Seattle. Prices for January average $741 per person but you can even find prices for as low as $489. The most expensive prices can be found in the month of June. Opting for a January flight can save you 86% on your journey compared to booking in June

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.

$215+ Flights from Seattle to Santiago de los Caballeros

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Cheap flight deals from Seattle to Santiago de los Caballeros

Round-trip from	$565 (American Airlines)
One-way from	$215 (eDestinos)
Popular in	June
Cheapest in	January
Average price	$1,382

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. 16% potential increase in price ($150 potential increase over avg. RT price).

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Cheapest flight prices on average. 8% potential price decrease ($59 potential savings vs. average RT price).

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Average for round-trip flights in June 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 junio 12, 2025.

jue. 9/45:43 pmSEA - STI

2 stops15h 44mAmerican Airlines

sáb. 9/131:29 pmSTI - SEA

2 stops22h 50mAmerican Airlines

Deal found 6/10

$565

jue. 9/48:37 amSEA - STI

1 stop23h 47mMultiple Airlines

sáb. 9/1312:19 pmSTI - SEA

1 stop12h 46mMultiple Airlines

Deal found 6/10

$584

mié. 7/165:30 pmSEA - STI

2 stops13h 20mSpirit Airlines

mié. 8/610:55 amSTI - SEA

2 stops32h 30mSpirit Airlines

Deal found 6/12

$614

sáb. 6/216:25 amSEA - STI

2 stops27h 32mUnited Airlines

jue. 7/102:07 pmSTI - SEA

2 stops20h 54mUnited Airlines

Deal found 6/11

$903

mar. 7/227:15 amSEA - STI

1 stop14h 32mDelta

jue. 7/316:03 amSTI - SEA

2 stops20h 58mDelta

Deal found 6/10

$985

jue. 7/2411:43 amSEA - STI

1 stop10h 55mJetBlue

mar. 7/2911:15 amSTI - SEA

1 stop13h 49mJetBlue

Deal found 6/10

$1,022

Best flights from Seattle to Santiago de los Caballeros
Discover carefully curated flight deals from Seattle to Santiago de los Caballeros that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated junio 12, 2025.

jue. 9/45:43 pmSEA - STI

2 stops15h 44mAmerican Airlines

sáb. 9/131:29 pmSTI - SEA

1 stop13h 30mAmerican Airlines

Deal found 6/10

$565

jue. 9/48:37 amSEA - STI

1 stop23h 47mMultiple Airlines

sáb. 9/1312:19 pmSTI - SEA

1 stop12h 46mMultiple Airlines

Deal found 6/10

$584

mié. 7/165:30 pmSEA - STI

2 stops13h 20mSpirit Airlines

mié. 8/610:55 amSTI - SEA

2 stops32h 30mSpirit Airlines

Deal found 6/12

$614

mar. 7/227:15 amSEA - STI

1 stop14h 32mDelta

jue. 7/316:03 amSTI - SEA

2 stops20h 58mDelta

Deal found 6/10

$985

jue. 7/2411:43 amSEA - STI

1 stop10h 55mJetBlue

mar. 7/2911:15 amSTI - SEA

1 stop13h 49mJetBlue

Deal found 6/10

$1,022

Last-minute flights from Seattle to Santiago de los Caballeros
Discover last-minute flight deals from Seattle to Santiago de los Caballeros. Data last updated junio 12, 2025 and is based on user searches.

sáb. 6/213:58 pmSEA - STI

2 stops15h 31mSpirit Airlines

mar. 7/111:29 amSTI - SEA

2 stops30h 34mSpirit Airlines

Deal found 6/10

$794

sáb. 6/216:25 amSEA - STI

2 stops27h 32mUnited Airlines

jue. 7/102:07 pmSTI - SEA

2 stops20h 54mUnited Airlines

Deal found 6/11

$903

sáb. 6/2112:10 pmSEA - STI

3 stops43h 19mMultiple Airlines

mar. 7/111:29 amSTI - SEA

3 stops30h 34mMultiple Airlines

Deal found 6/10

$937

sáb. 6/2110:58 pmSEA - STI

1 stop10h 41mDelta

jue. 7/106:03 amSTI - SEA

2 stops20h 56mDelta

Deal found 6/11

$998

sáb. 6/218:01 pmSEA - STI

1 stop22h 04mAmerican Airlines

jue. 7/107:04 amSTI - SEA

1 stop19h 53mAmerican Airlines

Deal found 6/11

$1,066

mié. 7/165:30 pmSEA - STI

2 stops13h 20mSpirit Airlines

mié. 8/610:55 amSTI - SEA

2 stops32h 30mSpirit Airlines

Deal found 6/12

$614

mié. 7/165:19 amSEA - STI

2 stops13h 00mAmerican Airlines

mié. 8/67:00 amSTI - SEA

1 stop20h 14mAmerican Airlines

Deal found 6/12

$815

mar. 7/227:15 amSEA - STI

1 stop14h 32mDelta

jue. 7/316:03 amSTI - SEA

2 stops20h 58mDelta

Deal found 6/10

$985

jue. 7/2411:43 amSEA - STI

1 stop10h 55mJetBlue

mar. 7/2911:15 amSTI - SEA

1 stop13h 49mJetBlue

Deal found 6/10

$1,022

One-way flights from Seattle to Santiago de los Caballeros
Search for one-way flight options from Seattle to Santiago de los Caballeros. Find affordable one-way fares based on user searches. Data last updated junio 12, 2025.

mar. 7/83:58 pmSEA - STI

2 stops14h 52mSpirit Airlines

Deal found 6/11

$215

mar. 7/811:20 pmSEA - STI

1 stop17h 14mJetBlue

Deal found 6/10

$572

lun. 7/712:20 amSEA - STI

2 stops11h 52mUnited Airlines

Deal found 6/10

$786

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Santiago de los Caballeros that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

jue. 9/4

5:43 pm-12:27 pm

2 stops15h 44m

Santiago de los Caballeros

sáb. 9/13

1:29 pm-9:19 am

2 stops22h 50m

$565

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

jue. 9/4

8:37 am-11:24 am

1 stop23h 47m

Santiago de los Caballeros

sáb. 9/13

12:19 pm-10:05 pm

1 stop12h 46m

$584

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

mié. 7/16

5:30 pm-9:50 am

2 stops13h 20m

Santiago de los Caballeros

mié. 8/6

10:55 am-4:25 pm

2 stops32h 30m

$614

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

sáb. 6/21

6:25 am-12:57 pm

2 stops27h 32m

Santiago de los Caballeros

jue. 7/10

2:07 pm-8:01 am

2 stops20h 54m

$903

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

mar. 7/22

7:15 am-12:47 am

1 stop14h 32m

Santiago de los Caballeros

jue. 7/31

6:03 am-12:01 am

2 stops20h 58m

$985

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

jue. 7/24

11:43 am-1:38 am

1 stop10h 55m

Santiago de los Caballeros

mar. 7/29

11:15 am-10:04 pm

1 stop13h 49m

$1,022

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

mar. 7/8

3:58 pm-9:50 am

2 stops14h 52m

$215

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

mar. 7/8

11:20 pm-7:34 pm

1 stop17h 14m

$572

SeattleSantiago de los Caballeros

SEA - STI

SEASTI

Seattle/Tacoma Intl

lun. 7/7

12:20 am-3:12 pm

2 stops11h 52m

$786

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 $630). 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?

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.

Rainfall in Santiago de los Caballeros by month

In terms of precipitation, rainfall in Santiago de los Caballeros ranges from 3.0 - 11.6 inches per month. December is typically the wettest month, when rainfall can reach 11.6 in. July is typically the driest time to visit Santiago de los Caballeros when rainfall is around 3.0 in.

Temperature in Santiago de los Caballeros by month

If weather is an important factor for your trip to Santiago de los Caballeros, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 73.4 F).

Reviews of airlines servicing Santiago de los Caballeros

See what other customers who have flown with Delta, United Airlines and JetBlue from Seattle to Santiago de los Caballeros have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,946 reviews

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

7,946 reviews

Delta

8.0

Very good

7,946 reviews

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

8,790 reviews

Delta

8.0

Very good

7,946 reviews

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

2,925 reviews

Delta

8.0

Very good

7,946 reviews

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

7,946 reviews

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

8,052 reviews

Delta

8.0

Very good

7,946 reviews

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

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 American Airlines. Our recent data shows that you can find tickets from as low as $565 on this airline. Additional options worth looking into are Spirit Airlines and Delta, starting at $614 and $985 round-trip. You may be able to fly from Seattle to Santiago de los Caballeros for 23% 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 $215. JetBlue flights start at $572 while deals on United Airlines start at $786 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 $630). 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

Top 2 airlines flying from Seattle to Santiago de los Caballeros

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$399	Average$730	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$470	Average$625	FlexibilityNo cancel fee	On-timeN/A

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$215+ 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.

Find cheap flights from Seattle to Santiago de los Caballeros with Cheapflights

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2. Select your favorite providers

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Cheap flight deals from Seattle to Santiago de los Caballeros

Round-trip from

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Cheapest in

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Find flight deals from Seattle to Santiago de los Caballeros

Cheapest flights from Seattle to Santiago de los CaballerosExplore 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 junio 12, 2025.

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 junio 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Santiago de los Caballeros that are best for you.

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.

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?

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 junio 12, 2025.

Rainfall in Santiago de los Caballeros by month

Plan your trip to Santiago de los Caballeros by taking into account the average rainfall totals by month.

Temperature in Santiago de los Caballeros by month

Plan your trip to Santiago de los Caballeros by taking into account the average temperature totals by month.

Reviews of airlines servicing Santiago de los Caballeros

See what other customers who have flown with Delta, United Airlines and JetBlue from Seattle to Santiago de los Caballeros have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

Can I find deals for flights from Seattle to Santiago de los Caballeros that include hotel bookings?

How can I 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?

What is the cheapest month to book a flight from Seattle to Santiago de los Caballeros?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Santiago de los Caballeros

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Seattle to Santiago de los Caballeros

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Book with Flexibility

Travel Smart

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 junio 12, 2025.