$222 Cheap Delta flights Seattle (SEA) to San José (SJO)

Grab affordable return Delta Air Lines flights from $391 from SEA to SJO by filtering your results from “Price (lowest to highest)” on Expedia. Or search for options from $222 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

September is one of the most affordable months to fly to San José with Delta Air Lines. You could also find great prices on return and one-way tickets in October.

Snagging the best Delta Air Lines deals from SEA to SJO often comes down to booking at the right moment. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. As an added bonus, you can pocket 17% on average by buying your tickets on a Sunday rather than a Friday, which is often the most expensive day to book.* It’s smart to kick off your flight search about one month before your departure date.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Enter your dates, hit search and tick the “Nonstop” filter on Expedia to find any direct flights from SEA to SJO with Delta Air Lines or other carriers.

To find the earliest departure from SEA to SJO with Delta Air Lines, filter your results by “Early Morning” and “Morning.” Choosing an early flight usually means you’ll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Hop on a Delta Air Lines flight from Seattle - Tacoma Intl. Airport (SEA) to San José, and you’ll likely arrive at Juan Santamaria Intl. Airport (SJO). This is the airline’s main hub in this destination.

With a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a top choice for many travelers flying from SEA to SJO. Also, if you’re a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be put toward future getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee generally applies if you modify or cancel your flight more than 24 hours after confirmation. To find plane tickets with more flexibility, select our “No cancel fee” or “Changes included” filter when looking for flights. For more details on canceling or modifying your reservation, go to “Trips,” select your flight and tick “Manage Booking.”