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Flights operate between Seattle (SEA) and Houston (IAH).

1 airline operates this route with 4-6 flights daily flights.

Average flight time is 4h 13m - 4h 44m.

Route distance is 1883 miles (3030 km).

Route Distance

1883 miles (3030 km)

Average Duration

4h 13m - 4h 44m

Airlines Operating This Route

United Airlines

Flight Frequency

Daily Flights

4-6 flights

Weekly Flights

45

Typical Departure Time Ranges

Earliest Departure

07:10

Latest Departure

23:59

Route Intelligence Dashboard

Overall Connectivity Score

70

Good
Route Diversity

1

Direct Routes

United Airlines serves 1 destination from SEA

Weekly Frequency

21

Weekly Flights

Trend: Stable

Top 1 Most Frequent Routes - Details
RouteWeekly FlightsDurationDistanceReliability
SEAHouston (IAH) (IAH)
21/week
4h 13m - 4h 44m1,883 km
Moderate
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Flight Schedule & Filters

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United Airlines flights from SeaTac (SEA) to Houston (IAH)

United Airlines operates scheduled nonstop flights between SeaTac (SEA) and Houston (IAH). United Airlines operates 4-6 flights daily flights on this route.Flight Duration: 4h 13m - 4h 44m (average flight time)Distance: 1883 miles (3030 km) (air miles between airports)Daily Flights: 4-6 flights (scheduled departures per day)

SEA
SeaTac (SEA)

US

IAH
Houston (IAH)

US

FLIGHT TIME

4h 13m - 4h 44m

FLIGHT DISTANCE

1883 miles (3030 km)
Flight time
4h 15m - 4h 28m
Earliest flight
07:10
Last flight
23:59
Distance
1883 miles (3030 km)
Cheapest month
January
Airlines
1 (Show)
Flights per week
45

United Airlines Terminal Information & Contact

Departure Terminal - SeaTac (SEA)

Terminal: 1

Phone: 1-800-864-8331

Location: 1, Seattle, US

Arrival Terminal - Houston (IAH)

Terminal: C

Phone: 1-800-864-8331

Location: C, Houston, US

United Airlines Flight Schedule from SeaTac (SEA) to Houston (IAH)

FlightAirlineDepartureArrivalAircraft

UA2135

United Airlines

United Airlines

07:10

13:38:00

Airbus A320

UA1475

United Airlines

United Airlines

13:43

20:10:00

Airbus A320

UA2379

United Airlines

United Airlines

23:59

06:14:00

Boeing 737-800 Passenger

United Airlines Monthly Flight Calendar

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View all 5 flights from SeaTac (SEA) to Houston (IAH) operated by 2 airlines

United Airlines Terminal Information

Departure Terminal at SeaTac (SEA):

• Terminal : United Airlines operates from this terminal

Terminal 1:

United Airlines Terminal Phone: 1-800-864-8331

Arrival Terminal at Houston (IAH):

• Terminal : United Airlines operates from this terminal

Terminal C:

United Airlines Terminal Phone: 1-800-864-8331

Weather & Climate at Houston (IAH)

21.7°C

Avg Temperature

126mm

Avg Rainfall

11.2km/h

Avg Wind Speed

74%

Avg Humidity

Best Months to Visit

Challenging Months

12-Month Weather Overview

Wind Speed by Month

Humidity by Month

Best Time to Book Flights to Houston (IAH)

Best Booking Window

Book 2-3 months in advance for best prices

Booking Tip

Avoid booking during extreme weather months for better deals

Peak Travel Months

2025-01
2025-04
2025-05
2025-10

Expect higher prices and more crowds during these months. Book early to secure better rates.

Recommended Months

2025-09

These months offer the best balance of weather, prices, and availability.

Monthly Booking Recommendations

Recommended - Best Value
Peak - Book Early
Normal

Flight Price Trends for Houston (IAH)

Cheapest Months to Fly

2023-09

Book flights during these months for the best deals and lowest prices.

Most Expensive Months

2023-01
2023-04
2023-05
2023-10

Prices are typically highest during these months. Consider booking well in advance or choosing alternative dates.

Price Trend Analysis

Prices are typically lower during shoulder seasons

Monthly Price Trends

Cheapest - Best Deals
Expensive - Higher Prices
Normal Prices

Best Months to Fly United Airlines to Houston (IAH)

Best Months

2025-09

Optimal conditions for travel with favorable weather, prices, and availability.

Shoulder Season

2025-02
2025-03
2025-06
2025-07
2025-08
2025-11
2025-12

Transition periods with moderate conditions. Good balance of price and experience.

Challenging Months

2025-01
2025-04
2025-05
2025-10

These months may have less favorable conditions. Plan accordingly and book early.

Seasonal Insight

Best travel months: 2025-09

Seasonal Travel Calendar

Best - Optimal Conditions
Shoulder - Good Value
Challenging
Extreme - Use Caution

United Airlines Contact Information and Customer Services

United Airlines Address

233 S. Wacker Drive
Chicago, IL 60606, United States

Customer Service Phone

+1-800-864-8331

Official Website

united.com

Follow United Airlines on Social Media

Instagram

Twitter

YouTube

TripAdvisor

Wikipedia

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Frequently Asked Questions

How many United Airlines flights operate from Seattle (SEA) to Houston (IAH)?

United Airlines operates 3 flights from Seattle (SEA) to Houston (IAH).

What city does Houston (IAH) airport serve?

Houston (IAH) airport serves Houston, US.

How long is the United Airlines flight from Seattle (SEA) to Houston (IAH)?

The flight duration is approximately 4h 13m - 4h 44m.

What is the distance from Seattle (SEA) to Houston (IAH)?

The distance is 1883 miles (3030 km).

What aircraft does United Airlines use on this route?

United Airlines uses Airbus A320, Boeing 737-800 Passenger on this route.

Which other airlines operate on this route?

1 other airline operates on this route: Alaska Airlines.

What are the earliest and latest United Airlines flight departure times?

The earliest United Airlines flight departs at 07:10 and the latest departs at 23:59.

View all United Airlines flights to Seattle (SEA) →

Popular United Airlines routes from Seattle include multiple destinations.

Route data verified regularly by Triposia Travel Research Team.

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