United Flight 3688 Deals & Information (2026/2027)

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United Flight 3688 Route Deals From $54

The cheapest prices found with in the last 7 days for return flights were $119 and $54 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Feb 1 - Wed, Feb 4
LGA
LaGuardia
IAD
Washington Dulles Intl.
$119 Roundtrip, found 3 days ago
$119
Roundtrip
found 3 days ago
Select United flight, departing Sun, Feb 1 from LaGuardia to Washington Dulles Intl., returning Wed, Feb 4, priced at $119 found 3 days ago
Sun, Feb 1 - Wed, Feb 4
LGA
LaGuardia
IAD
Washington Dulles Intl.
$130 Roundtrip, found 3 days ago
$130
Roundtrip
found 3 days ago
Select United flight, departing Sun, Feb 1 from LaGuardia to Washington Dulles Intl., returning Wed, Feb 4, priced at $130 found 3 days ago
Thu, Feb 5 - Sun, Feb 8
LGA
LaGuardia
IAD
Washington Dulles Intl.
$135 Roundtrip, found 1 day ago
$135
Roundtrip
found 1 day ago
Select United flight, departing Thu, Feb 5 from LaGuardia to Washington Dulles Intl., returning Sun, Feb 8, priced at $135 found 1 day ago
Wed, Jan 28 - Sat, Jan 31
LGA
LaGuardia
IAD
Washington Dulles Intl.
$139 Roundtrip, found 19 hours ago
$139
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Jan 28 from LaGuardia to Washington Dulles Intl., returning Sat, Jan 31, priced at $139 found 19 hours ago
Fri, Jan 30 - Sun, Feb 1
LGA
LaGuardia
IAD
Washington Dulles Intl.
$140 Roundtrip, found 6 hours ago
$140
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Jan 30 from LaGuardia to Washington Dulles Intl., returning Sun, Feb 1, priced at $140 found 6 hours ago
Fri, Jan 30 - Sun, Feb 1
LGA
LaGuardia
IAD
Washington Dulles Intl.
$146 Roundtrip, found 6 hours ago
$146
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Jan 30 from LaGuardia to Washington Dulles Intl., returning Sun, Feb 1, priced at $146 found 6 hours ago
Mon, Feb 9 - Tue, Feb 10
LGA
LaGuardia
IAD
Washington Dulles Intl.
$159 Roundtrip, found 1 day ago
$159
Roundtrip
found 1 day ago
Select United flight, departing Mon, Feb 9 from LaGuardia to Washington Dulles Intl., returning Tue, Feb 10, priced at $159 found 1 day ago
Sun, Feb 1 - Mon, Feb 2
LGA
LaGuardia
IAD
Washington Dulles Intl.
$160 Roundtrip, found 3 days ago
$160
Roundtrip
found 3 days ago
Select United flight, departing Sun, Feb 1 from LaGuardia to Washington Dulles Intl., returning Mon, Feb 2, priced at $160 found 3 days ago
Mon, Feb 9 - Tue, Feb 10
LGA
LaGuardia
IAD
Washington Dulles Intl.
$176 Roundtrip, found 1 day ago
$176
Roundtrip
found 1 day ago
Select United flight, departing Mon, Feb 9 from LaGuardia to Washington Dulles Intl., returning Tue, Feb 10, priced at $176 found 1 day ago
Fri, Jan 30 - Sun, Feb 1
LGA
LaGuardia
IAD
Washington Dulles Intl.
$187 Roundtrip, found 6 hours ago
$187
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Jan 30 from LaGuardia to Washington Dulles Intl., returning Sun, Feb 1, priced at $187 found 6 hours ago

Frequently asked questions

What route does flight number UA3688 take?
UA3688 takes around 3 hours and 5 minutes to fly straight from SRQ Airport to O'Hare Intl. Airport (ORD). We all know there's magic in the destination, but the journey is always half the fun!
What kind of plane is on flight number UA3688?
The route for flight number UA3688 is almost always Sarasota, FL Airport (SRQ-Sarasota-Bradenton Intl.) to O'Hare Intl. Airport (ORD), and the Embraer 175 is the aircraft model you're likely to be traveling aboard.
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 UA3688 flight with Travelocity, please visit our Customer Service Portal.