United Flight 641 Deals & Information (2026/2027)

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United Flight 641 Route Deals From $91

The cheapest prices found with in the last 7 days for return flights were $97 and $91 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jun 23 - Wed, Jul 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$97 Roundtrip, found 6 hours ago
$97
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Jun 23 from Washington Dulles Intl. to Logan Intl., returning Wed, Jul 1, priced at $97 found 6 hours ago
Wed, Jun 3 - Wed, Jun 10
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$100 Roundtrip, found 1 day ago
$100
Roundtrip
found 1 day ago
Select United flight, departing Wed, Jun 3 from Washington Dulles Intl. to Logan Intl., returning Wed, Jun 10, priced at $100 found 1 day ago
Wed, Aug 19 - Tue, Aug 25
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$111 Roundtrip, found 4 days ago
$111
Roundtrip
found 4 days ago
Select United flight, departing Wed, Aug 19 from Washington Dulles Intl. to Logan Intl., returning Tue, Aug 25, priced at $111 found 4 days ago
Tue, Jun 23 - Wed, Jul 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$116 Roundtrip, found 6 hours ago
$116
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Jun 23 from Washington Dulles Intl. to Logan Intl., returning Wed, Jul 1, priced at $116 found 6 hours ago
Wed, Aug 19 - Tue, Aug 25
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$119 Roundtrip, found 4 days ago
$119
Roundtrip
found 4 days ago
Select United flight, departing Wed, Aug 19 from Washington Dulles Intl. to Logan Intl., returning Tue, Aug 25, priced at $119 found 4 days ago
Tue, Jun 23 - Wed, Jul 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$125 Roundtrip, found 6 hours ago
$125
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Jun 23 from Washington Dulles Intl. to Logan Intl., returning Wed, Jul 1, priced at $125 found 6 hours ago
Tue, Jun 23 - Wed, Jul 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$127 Roundtrip, found 6 hours ago
$127
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Jun 23 from Washington Dulles Intl. to Logan Intl., returning Wed, Jul 1, priced at $127 found 6 hours ago
Wed, May 6 - Wed, May 20
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$136 Roundtrip, found 1 day ago
$136
Roundtrip
found 1 day ago
Select United flight, departing Wed, May 6 from Washington Dulles Intl. to Logan Intl., returning Wed, May 20, priced at $136 found 1 day ago
Tue, May 12 - Fri, May 15
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$140 Roundtrip, found 2 hours ago
$140
Roundtrip
found 2 hours ago
Select United flight, departing Tue, May 12 from Washington Dulles Intl. to Logan Intl., returning Fri, May 15, priced at $140 found 2 hours ago
Tue, Jun 23 - Wed, Jul 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$146 Roundtrip, found 6 hours ago
$146
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Jun 23 from Washington Dulles Intl. to Logan Intl., returning Wed, Jul 1, priced at $146 found 6 hours ago
Wed, May 6 - Wed, May 20
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$150 Roundtrip, found 1 day ago
$150
Roundtrip
found 1 day ago
Select United flight, departing Wed, May 6 from Washington Dulles Intl. to Logan Intl., returning Wed, May 20, priced at $150 found 1 day 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.