United Flight UA641 Deals & Information (2025/2026)

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United Flight 641 Route Deals From $59

The cheapest prices found with in the last 7 days for return flights were $127 and $59 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Dec 3 - Thu, Dec 4
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$127 Roundtrip, found 3 days ago
$127
Roundtrip
found 3 days ago
Select United flight, departing Wed, Dec 3 from Washington Dulles Intl. to Logan Intl., returning Thu, Dec 4, priced at $127 found 3 days ago
Wed, Oct 15 - Thu, Oct 16
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$129 Roundtrip, found 1 day ago
$129
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 15 from Washington Dulles Intl. to Logan Intl., returning Thu, Oct 16, priced at $129 found 1 day ago
Mon, Oct 27 - Wed, Oct 29
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$134 Roundtrip, found 1 day ago
$134
Roundtrip
found 1 day ago
Select United flight, departing Mon, Oct 27 from Washington Dulles Intl. to Logan Intl., returning Wed, Oct 29, priced at $134 found 1 day ago
Tue, Oct 21 - Fri, Oct 31
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$134 Roundtrip, found 22 hours ago
$134
Roundtrip
found 22 hours ago
Select United flight, departing Tue, Oct 21 from Washington Dulles Intl. to Logan Intl., returning Fri, Oct 31, priced at $134 found 22 hours ago
Mon, Oct 27 - Wed, Oct 29
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$139 Roundtrip, found 1 day ago
$139
Roundtrip
found 1 day ago
Select United flight, departing Mon, Oct 27 from Washington Dulles Intl. to Logan Intl., returning Wed, Oct 29, priced at $139 found 1 day ago
Wed, Oct 15 - Wed, Oct 22
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$139 Roundtrip, just found
$139
Roundtrip
just found
Select United flight, departing Wed, Oct 15 from Washington Dulles Intl. to Logan Intl., returning Wed, Oct 22, priced at $139 just found
Wed, Feb 18 - Sun, Feb 22
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$142 Roundtrip, found 4 days ago
$142
Roundtrip
found 4 days ago
Select United flight, departing Wed, Feb 18 from Washington Dulles Intl. to Logan Intl., returning Sun, Feb 22, priced at $142 found 4 days ago
Wed, Oct 15 - Thu, Oct 16
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$144 Roundtrip, found 1 day ago
$144
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 15 from Washington Dulles Intl. to Logan Intl., returning Thu, Oct 16, priced at $144 found 1 day ago
Wed, Oct 15 - Wed, Oct 22
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$149 Roundtrip, just found
$149
Roundtrip
just found
Select United flight, departing Wed, Oct 15 from Washington Dulles Intl. to Logan Intl., returning Wed, Oct 22, priced at $149 just found
Tue, Oct 21 - Fri, Oct 31
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$149 Roundtrip, found 22 hours ago
$149
Roundtrip
found 22 hours ago
Select United flight, departing Tue, Oct 21 from Washington Dulles Intl. to Logan Intl., returning Fri, Oct 31, priced at $149 found 22 hours ago

Frequently asked questions

What route does flight number UA641 take?
UA641 takes a number of routes. The most popular is Salt Lake City, UT Airport (SLC-Salt Lake City Intl.) to George Bush Intercontinental Airport (IAH), which flies direct. This service takes roughly 2 hours and 58 minutes. However, you might find other flights with the same number that have one or more stops.
What kind of plane is on flight number UA641?
There's a good chance you'll be setting off on the Boeing 737-800 if you've booked a seat from Salt Lake City, UT Airport (SLC-Salt Lake City Intl.) to Houston Airport, a popular route for flight UA641.
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 UA641 flight with Travelocity, please visit our Customer Service Portal.