United Flight UA641 Deals & Information (2025/2026)

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United Flight 641 Route Deals From $69

The cheapest prices found with in the last 7 days for return flights were $137 and $69 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 9 - Tue, Sep 16
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$137 Roundtrip, found 5 days ago
$137
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 9 from Washington Dulles Intl. to Logan Intl., returning Tue, Sep 16, priced at $137 found 5 days ago
Tue, Sep 9 - Tue, Sep 16
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$147 Roundtrip, found 5 days ago
$147
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 9 from Washington Dulles Intl. to Logan Intl., returning Tue, Sep 16, priced at $147 found 5 days ago
Tue, Sep 9 - Tue, Sep 16
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$157 Roundtrip, found 5 days ago
$157
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 9 from Washington Dulles Intl. to Logan Intl., returning Tue, Sep 16, priced at $157 found 5 days ago
Tue, Sep 9 - Tue, Sep 16
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$163 Roundtrip, found 5 days ago
$163
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 9 from Washington Dulles Intl. to Logan Intl., returning Tue, Sep 16, priced at $163 found 5 days ago
Wed, Sep 17 - Mon, Sep 29
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$164 Roundtrip, found 6 days ago
$164
Roundtrip
found 6 days ago
Select United flight, departing Wed, Sep 17 from Washington Dulles Intl. to Logan Intl., returning Mon, Sep 29, priced at $164 found 6 days ago
Fri, Sep 5 - Sun, Sep 7
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$167 Roundtrip, found 19 hours ago
$167
Roundtrip
found 19 hours ago
Select United flight, departing Fri, Sep 5 from Washington Dulles Intl. to Logan Intl., returning Sun, Sep 7, priced at $167 found 19 hours ago
Wed, Jul 16 - Sat, Jul 19
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$170 Roundtrip, found 13 hours ago
$170
Roundtrip
found 13 hours ago
Select United flight, departing Wed, Jul 16 from Washington Dulles Intl. to Logan Intl., returning Sat, Jul 19, priced at $170 found 13 hours ago
Fri, Aug 1 - Thu, Aug 7
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$171 Roundtrip, found 4 days ago
$171
Roundtrip
found 4 days ago
Select United flight, departing Fri, Aug 1 from Washington Dulles Intl. to Logan Intl., returning Thu, Aug 7, priced at $171 found 4 days ago
Wed, Sep 24 - Fri, Sep 26
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$172 Roundtrip, found 5 days ago
$172
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 24 from Washington Dulles Intl. to Logan Intl., returning Fri, Sep 26, priced at $172 found 5 days ago
Wed, Sep 17 - Mon, Sep 29
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$174 Roundtrip, found 6 days ago
$174
Roundtrip
found 6 days ago
Select United flight, departing Wed, Sep 17 from Washington Dulles Intl. to Logan Intl., returning Mon, Sep 29, priced at $174 found 6 days 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.