United Flight DL1631 Deals & Information (2025/2026)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

United Flight 1631 Route Deals From $70

The cheapest prices found with in the last 7 days for return flights were $119 and $70 for one-way flights to Hartsfield-Jackson Atlanta Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jul 31 - Tue, Aug 5
IAH
George Bush Intercontinental
ATL
Hartsfield-Jackson Atlanta Intl.
$119 Roundtrip, found 1 hour ago
$119
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Jul 31 from George Bush Intercontinental to Hartsfield-Jackson Atlanta Intl., returning Tue, Aug 5, priced at $119 found 1 hour ago

Frequently asked questions

What route does flight number UA1631 take?
UA1631 takes numerous routes. The most frequently flown is Sea-Tac Airport to Washington Dulles Intl. Airport (IAD), which is a direct flight. This service takes around 4 hours and 55 minutes. However, there may possibly be other flights with this number that have one or more stops.
What kind of plane is on flight number UA1631?
UA1631 is a flight number that serves a number of different routes. If you're heading off on the most common route, Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to IAD, chances are you'll be hopping aboard the Boeing 737-900.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA1631 flight with Travelocity, please visit our Customer Service Portal.