United Flight UA641 Deals & Information (2025/2026)

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United Flight 641 Route Deals From $81

The cheapest prices found with in the last 7 days for return flights were $164 and $81 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 30 - Sat, Sep 6
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$164 Roundtrip, found 5 days ago
$164
Roundtrip
found 5 days ago
Select United flight, departing Sat, Aug 30 from Washington Dulles Intl. to Logan Intl., returning Sat, Sep 6, priced at $164 found 5 days ago
Fri, May 23 - Sun, May 25
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$167 Roundtrip, found 1 day ago
$167
Roundtrip
found 1 day ago
Select United flight, departing Fri, May 23 from Washington Dulles Intl. to Logan Intl., returning Sun, May 25, priced at $167 found 1 day ago
Thu, Jul 17 - Sun, Jul 20
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$168 Roundtrip, found 2 days ago
$168
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 17 from Washington Dulles Intl. to Logan Intl., returning Sun, Jul 20, priced at $168 found 2 days ago
Thu, May 29 - Sun, Jun 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$170 Roundtrip, found 1 day ago
$170
Roundtrip
found 1 day ago
Select United flight, departing Thu, May 29 from Washington Dulles Intl. to Logan Intl., returning Sun, Jun 1, priced at $170 found 1 day ago
Fri, Jul 25 - Sat, Jul 26
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$173 Roundtrip, found 1 day ago
$173
Roundtrip
found 1 day ago
Select United flight, departing Fri, Jul 25 from Washington Dulles Intl. to Logan Intl., returning Sat, Jul 26, priced at $173 found 1 day ago
Sat, Jun 28 - Tue, Jul 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$174 Roundtrip, just found
$174
Roundtrip
just found
Select United flight, departing Sat, Jun 28 from Washington Dulles Intl. to Logan Intl., returning Tue, Jul 1, priced at $174 just found
Sun, Jun 29 - Tue, Jul 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$176 Roundtrip, found 3 days ago
$176
Roundtrip
found 3 days ago
Select United flight, departing Sun, Jun 29 from Washington Dulles Intl. to Logan Intl., returning Tue, Jul 1, priced at $176 found 3 days ago
Sun, Aug 3 - Sat, Aug 9
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$177 Roundtrip, found 4 hours ago
$177
Roundtrip
found 4 hours ago
Select United flight, departing Sun, Aug 3 from Washington Dulles Intl. to Logan Intl., returning Sat, Aug 9, priced at $177 found 4 hours ago
Thu, Jul 17 - Sun, Jul 20
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$178 Roundtrip, found 2 days ago
$178
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jul 17 from Washington Dulles Intl. to Logan Intl., returning Sun, Jul 20, priced at $178 found 2 days ago
Wed, May 7 - Wed, May 14
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$179 Roundtrip, found 1 day ago
$179
Roundtrip
found 1 day ago
Select United flight, departing Wed, May 7 from Washington Dulles Intl. to Logan Intl., returning Wed, May 14, priced at $179 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.