United Flight 641 Deals & Information (2026/2027)

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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 $140 and $81 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jun 3 - Wed, Jun 10
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$140 Roundtrip, found 19 hours ago
$140
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Jun 3 from Washington Dulles Intl. to Logan Intl., returning Wed, Jun 10, priced at $140 found 19 hours ago
Wed, Jun 3 - Wed, Jun 10
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$150 Roundtrip, found 19 hours ago
$150
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Jun 3 from Washington Dulles Intl. to Logan Intl., returning Wed, Jun 10, priced at $150 found 19 hours ago
Wed, Jun 3 - Wed, Jun 10
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$160 Roundtrip, found 19 hours ago
$160
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Jun 3 from Washington Dulles Intl. to Logan Intl., returning Wed, Jun 10, priced at $160 found 19 hours ago
Wed, Jun 3 - Wed, Jun 10
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$162 Roundtrip, found 19 hours ago
$162
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Jun 3 from Washington Dulles Intl. to Logan Intl., returning Wed, Jun 10, priced at $162 found 19 hours ago
Wed, Jun 3 - Wed, Jun 10
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$172 Roundtrip, found 19 hours ago
$172
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Jun 3 from Washington Dulles Intl. to Logan Intl., returning Wed, Jun 10, priced at $172 found 19 hours ago
Sat, Aug 22 - Wed, Aug 26
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$174 Roundtrip, found 1 day ago
$174
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 22 from Washington Dulles Intl. to Logan Intl., returning Wed, Aug 26, priced at $174 found 1 day ago
Wed, Jun 3 - Wed, Jun 10
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$179 Roundtrip, found 19 hours ago
$179
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Jun 3 from Washington Dulles Intl. to Logan Intl., returning Wed, Jun 10, priced at $179 found 19 hours ago
Thu, Jul 9 - Wed, Jul 15
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$182 Roundtrip, found 6 hours ago
$182
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Jul 9 from Washington Dulles Intl. to Logan Intl., returning Wed, Jul 15, priced at $182 found 6 hours ago
Sat, Aug 22 - Wed, Aug 26
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 22 from Washington Dulles Intl. to Logan Intl., returning Wed, Aug 26, priced at $184 found 1 day ago
Wed, May 27 - Mon, Jun 1
IAD
Washington Dulles Intl.
BOS
Logan Intl.
$189 Roundtrip, found 9 hours ago
$189
Roundtrip
found 9 hours ago
Select United flight, departing Wed, May 27 from Washington Dulles Intl. to Logan Intl., returning Mon, Jun 1, priced at $189 found 9 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.