United Flight 3688 Deals & Information (2026/2027)

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United Flight 3688 Route Deals From $70

The cheapest prices found with in the last 7 days for return flights were $117 and $70 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, May 26 - Wed, May 27
LGA
LaGuardia
IAD
Washington Dulles Intl.
$117 Roundtrip, found 1 day ago
$117
Roundtrip
found 1 day ago
Select United flight, departing Tue, May 26 from LaGuardia to Washington Dulles Intl., returning Wed, May 27, priced at $117 found 1 day ago
Tue, May 26 - Wed, May 27
LGA
LaGuardia
IAD
Washington Dulles Intl.
$127 Roundtrip, found 1 day ago
$127
Roundtrip
found 1 day ago
Select United flight, departing Tue, May 26 from LaGuardia to Washington Dulles Intl., returning Wed, May 27, priced at $127 found 1 day ago
Sat, Apr 18 - Sun, Apr 19
LGA
LaGuardia
IAD
Washington Dulles Intl.
$137 Roundtrip, found 2 days ago
$137
Roundtrip
found 2 days ago
Select United flight, departing Sat, Apr 18 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 19, priced at $137 found 2 days ago
Wed, Apr 22 - Sun, Apr 26
LGA
LaGuardia
IAD
Washington Dulles Intl.
$141 Roundtrip, found 6 days ago
$141
Roundtrip
found 6 days ago
Select United flight, departing Wed, Apr 22 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 26, priced at $141 found 6 days ago
Thu, May 7 - Tue, May 12
LGA
LaGuardia
IAD
Washington Dulles Intl.
$148 Roundtrip, found 2 days ago
$148
Roundtrip
found 2 days ago
Select United flight, departing Thu, May 7 from LaGuardia to Washington Dulles Intl., returning Tue, May 12, priced at $148 found 2 days ago
Wed, May 27 - Sat, May 30
LGA
LaGuardia
IAD
Washington Dulles Intl.
$149 Roundtrip, found 2 days ago
$149
Roundtrip
found 2 days ago
Select United flight, departing Wed, May 27 from LaGuardia to Washington Dulles Intl., returning Sat, May 30, priced at $149 found 2 days ago
Tue, Mar 17 - Tue, Mar 24
LGA
LaGuardia
IAD
Washington Dulles Intl.
$153 Roundtrip, found 3 days ago
$153
Roundtrip
found 3 days ago
Select United flight, departing Tue, Mar 17 from LaGuardia to Washington Dulles Intl., returning Tue, Mar 24, priced at $153 found 3 days ago
Thu, Aug 6 - Fri, Aug 7
LGA
LaGuardia
IAD
Washington Dulles Intl.
$159 Roundtrip, found 2 days ago
$159
Roundtrip
found 2 days ago
Select United flight, departing Thu, Aug 6 from LaGuardia to Washington Dulles Intl., returning Fri, Aug 7, priced at $159 found 2 days ago
Fri, Mar 27 - Sat, Mar 28
LGA
LaGuardia
IAD
Washington Dulles Intl.
$164 Roundtrip, found 1 day ago
$164
Roundtrip
found 1 day ago
Select United flight, departing Fri, Mar 27 from LaGuardia to Washington Dulles Intl., returning Sat, Mar 28, priced at $164 found 1 day ago
Tue, May 26 - Wed, May 27
LGA
LaGuardia
IAD
Washington Dulles Intl.
$169 Roundtrip, found 1 day ago
$169
Roundtrip
found 1 day ago
Select United flight, departing Tue, May 26 from LaGuardia to Washington Dulles Intl., returning Wed, May 27, priced at $169 found 1 day 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.