United Flight 3688 Deals & Information (2026/2027)

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United Flight 3688 Route Deals From $72

The cheapest prices found with in the last 7 days for return flights were $139 and $72 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jan 15 - Mon, Jan 18
LGA
LaGuardia
IAD
Washington Dulles Intl.
$139 Roundtrip, found 4 days ago
$139
Roundtrip
found 4 days ago
Select United flight, departing Fri, Jan 15 from LaGuardia to Washington Dulles Intl., returning Mon, Jan 18, priced at $139 found 4 days ago
Sun, Mar 29 - Mon, Mar 30
LGA
LaGuardia
IAD
Washington Dulles Intl.
$144 Roundtrip, found 4 days ago
$144
Roundtrip
found 4 days ago
Select United flight, departing Sun, Mar 29 from LaGuardia to Washington Dulles Intl., returning Mon, Mar 30, priced at $144 found 4 days ago
Fri, Jan 15 - Mon, Jan 18
LGA
LaGuardia
IAD
Washington Dulles Intl.
$154 Roundtrip, found 4 days ago
$154
Roundtrip
found 4 days ago
Select United flight, departing Fri, Jan 15 from LaGuardia to Washington Dulles Intl., returning Mon, Jan 18, priced at $154 found 4 days ago
Tue, May 19 - Wed, May 20
LGA
LaGuardia
IAD
Washington Dulles Intl.
$159 Roundtrip, found 1 day ago
$159
Roundtrip
found 1 day ago
Select United flight, departing Tue, May 19 from LaGuardia to Washington Dulles Intl., returning Wed, May 20, priced at $159 found 1 day ago
Mon, Mar 23 - Tue, Mar 24
LGA
LaGuardia
IAD
Washington Dulles Intl.
$163 Roundtrip, found 5 days ago
$163
Roundtrip
found 5 days ago
Select United flight, departing Mon, Mar 23 from LaGuardia to Washington Dulles Intl., returning Tue, Mar 24, priced at $163 found 5 days ago
Wed, May 13 - Sat, May 16
LGA
LaGuardia
IAD
Washington Dulles Intl.
$164 Roundtrip, found 5 days ago
$164
Roundtrip
found 5 days ago
Select United flight, departing Wed, May 13 from LaGuardia to Washington Dulles Intl., returning Sat, May 16, priced at $164 found 5 days ago
Tue, Apr 14 - Wed, Apr 15
LGA
LaGuardia
IAD
Washington Dulles Intl.
$169 Roundtrip, found 7 hours ago
$169
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Apr 14 from LaGuardia to Washington Dulles Intl., returning Wed, Apr 15, priced at $169 found 7 hours ago
Mon, Mar 23 - Tue, Mar 24
LGA
LaGuardia
IAD
Washington Dulles Intl.
$173 Roundtrip, found 5 days ago
$173
Roundtrip
found 5 days ago
Select United flight, departing Mon, Mar 23 from LaGuardia to Washington Dulles Intl., returning Tue, Mar 24, priced at $173 found 5 days ago
Wed, May 13 - Sat, May 16
LGA
LaGuardia
IAD
Washington Dulles Intl.
$173 Roundtrip, found 5 days ago
$173
Roundtrip
found 5 days ago
Select United flight, departing Wed, May 13 from LaGuardia to Washington Dulles Intl., returning Sat, May 16, priced at $173 found 5 days ago
Fri, Apr 24 - Mon, Apr 27
LGA
LaGuardia
IAD
Washington Dulles Intl.
$185 Roundtrip, found 3 days ago
$185
Roundtrip
found 3 days ago
Select United flight, departing Fri, Apr 24 from LaGuardia to Washington Dulles Intl., returning Mon, Apr 27, priced at $185 found 3 days 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.