Route guide · 1,872 miles
Cheap Flights from Seattle to Houston
SEA → IAH · Nonstop 4h 18m · Live round-trip fares
Plenty of travelers price out Seattle to Houston every day — here's how to beat the average fare. Nonstops run about 4h 18m, and the calendar matters more than the airline. Aim to book 4–8 weeks ahead, stay flexible on the day of the week, and set a free alert so a price drop never slips past you.
Live fares for SEA → IAH are updating. Use the search below for real-time prices.
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Updated daily
Flight time
4h 18m
Nonstop, typical
Distance
1,872 mi
SEA → IAH
Cheapest month
December 2026
Fares from $127
Nonstop airlines
3
Alaska Airlines, Delta Air Lines & more
Nonstop flights from Seattle to Houston
Nonstop service links Seattle and Houston directly — flights are flown by Alaska Airlines, Delta Air Lines, United Airlines. Expect roughly 4h 18m in the air. If a nonstop is what you want, don't wait too long: booking 4–8 weeks ahead is when these seats are priced most kindly.
Booking insights: Seattle → Houston
- Distance: 1,872 miles · nonstop flight time: 4h 18m.
- Cheapest upcoming week in the live data starts around Dec 9, with fares from $127.
- Of the months we're tracking right now, December 2026 has the lowest fares, starting at $127.
- Rule of thumb for this route: the sweet spot is usually 4–8 weeks before departure.
- Midweek departures (Tue–Thu) are consistently cheaper than weekend flights.
- Set a free Flyzento alert instead of checking daily — the best fares can sell out in hours.
Price trend
Cheapest departure weeks ahead
Departing around Dec 9 is currently the cheapest window — about $123 less than the nearest weeks. Based on recent fares found for this route; prices change quickly.
Cheapest month · Seattle → Houston
December 2026
Every date's recent round-trip fare, at a glance.
Fares from
$127
Cheapest: Sat, Dec 12 — $127 · Priciest: Dec 28 — $160
Get this fare →Recent fares found for specific dates in December 2026. Blank days had no recent fare in our data — ask our team and we'll check them for you.
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Flying from Seattle to Houston: what you need to know
The flight
Seattle to Houston is a proper cross-country leg — 1,872 miles and around 4h 18m in the air nonstop. Download entertainment before you board, bring a full water bottle, and think about the time change: even a two-hour shift can leave you groggy if you land late and start early.
Airlines on this route
Alaska Airlines, Delta Air Lines and United Airlines fly this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from Seattle (SEA)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our Seattle airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Houston (IAH)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Houston airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Houston to Seattle fares — prices on the return direction often move on a different rhythm.
When to book
Of the months we're currently tracking, December 2026 is coming in cheapest for this route, with fares from $127. As a rule, booking 4–8 weeks ahead lands you in the sweet spot — leave it to the final two weeks and prices usually climb. If you see a fare that works, don't wait around: set a fare alert on this page and we'll watch the price for you.
Good to know before you go
- Nonstop time on this route is about 4h 18m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
- Tuesday and Wednesday departures are typically the cheapest days on domestic routes.
- Screenshot your fare before you enquire — prices move, and a saved fare helps our team match or beat it.
- December 2026 is currently the cheapest tracked month on this route — check those dates first if you're flexible.
- Morning flights are delayed less often than evening ones — earlier departures have the best on-time record.
Seattle to Houston flight FAQs
How long is the flight from SEA to IAH?
Plan on about 4h 18m in the air for a nonstop from Seattle to Houston — the route runs roughly 1,872 miles. Connecting flights typically add 2–4 hours.
Are there nonstop flights from Seattle to Houston?
Yes — look for Alaska Airlines, Delta Air Lines, United Airlines on this route. Nonstop seats are usually priced best 4–8 weeks before departure.
What is the cheapest month to fly from Seattle to Houston?
Of the months we're tracking right now, December 2026 has the lowest fares from Seattle to Houston, starting at $127. Fares update as new data comes in, so it's worth setting a free alert for your dates.
How much are last minute flights from SEA to IAH?
Book inside the final week and you'll usually pay a premium on SEA to IAH. Fares booked 4–8 weeks ahead are almost always kinder.
What is a good round-trip deal from Seattle to Houston?
A good deal is anything at or below the recent fares shown above. Set a free Flyzento alert and we'll ping you the moment fares drop.
Which airlines fly from Seattle to Houston?
The main carriers on this route are Alaska Airlines, Delta Air Lines, United Airlines. Comparing all of them on the live search below usually surfaces the lowest fare for your dates.
How early should I get to Seattle airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
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