$139 Cheap Delta flights Seattle (SEA) to Houston (IAH)

Make use of the “Price (lowest to highest)” filter on Expedia to search for cheap Delta Air Lines round-trip flights from $277 from SEA to IAH. Affordable one-way options from $139 are available as well.**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.

Browse for one-way or return flights to Houston in November or February. You could find a cheap fare with Delta Air Lines during these off-peak months.

To find cheap Delta Air Lines fares from Seattle - Tacoma Intl. Airport (SEA) to George Bush Intercontinental Airport (IAH), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the overall price. Sunday is usually the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**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.

Click on the “Nonstop” filter when looking for direct Delta Air Lines flights from SEA to IAH. It’s also a great way to compare other carriers offering the same direct route.

To find the earliest departures from SEA to IAH with Delta Air Lines, filter your search by “Early Morning” and “Morning.” Choosing an early flight generally means you’re less likely to experience 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.

George Bush Intercontinental Airport (IAH) is the primary Houston gateway for Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA).

With an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a top choice for many passengers heading from SEA to IAH. Plus, 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 spent on future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of fare you purchased, a fee typically applies if you cancel or change your booking more than 24 hours after it has been confirmed. To find plane tickets with more flexibility, select our “No cancel fee” or “Changes included” filter while searching for flights. For additional information on canceling or changing your reservation, head to “Trips,” select your flight and click on “Manage Booking.”