United Flight 3688 Deals & Information (2025/2026)

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United Flight 3688 Route Deals From $59

The cheapest prices found with in the last 7 days for return flights were $117 and $59 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 26 - Wed, Aug 27
LGA
LaGuardia
IAD
Washington Dulles Intl.
$117 Roundtrip, found 5 days ago
$117
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 26 from LaGuardia to Washington Dulles Intl., returning Wed, Aug 27, priced at $117 found 5 days ago
Thu, Aug 7 - Sat, Aug 16
LGA
LaGuardia
IAD
Washington Dulles Intl.
$127 Roundtrip, found 5 days ago
$127
Roundtrip
found 5 days ago
Select United flight, departing Thu, Aug 7 from LaGuardia to Washington Dulles Intl., returning Sat, Aug 16, priced at $127 found 5 days ago
Sat, Sep 13 - Sun, Sep 14
LGA
LaGuardia
IAD
Washington Dulles Intl.
$129 Roundtrip, found 2 days ago
$129
Roundtrip
found 2 days ago
Select United flight, departing Sat, Sep 13 from LaGuardia to Washington Dulles Intl., returning Sun, Sep 14, priced at $129 found 2 days ago
Thu, Aug 14 - Fri, Aug 15
LGA
LaGuardia
IAD
Washington Dulles Intl.
$138 Roundtrip, found 8 hours ago
$138
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Aug 14 from LaGuardia to Washington Dulles Intl., returning Fri, Aug 15, priced at $138 found 8 hours ago
Thu, Aug 14 - Sun, Aug 17
LGA
LaGuardia
IAD
Washington Dulles Intl.
$139 Roundtrip, found 11 hours ago
$139
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Aug 14 from LaGuardia to Washington Dulles Intl., returning Sun, Aug 17, priced at $139 found 11 hours ago
Fri, Aug 8 - Sun, Aug 10
LGA
LaGuardia
IAD
Washington Dulles Intl.
$147 Roundtrip, found 12 hours ago
$147
Roundtrip
found 12 hours ago
Select United flight, departing Fri, Aug 8 from LaGuardia to Washington Dulles Intl., returning Sun, Aug 10, priced at $147 found 12 hours ago
Thu, Aug 7 - Sun, Aug 10
LGA
LaGuardia
IAD
Washington Dulles Intl.
$153 Roundtrip, found 4 days ago
$153
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 7 from LaGuardia to Washington Dulles Intl., returning Sun, Aug 10, priced at $153 found 4 days ago
Sat, Sep 13 - Sun, Sep 14
LGA
LaGuardia
IAD
Washington Dulles Intl.
$154 Roundtrip, found 2 days ago
$154
Roundtrip
found 2 days ago
Select United flight, departing Sat, Sep 13 from LaGuardia to Washington Dulles Intl., returning Sun, Sep 14, priced at $154 found 2 days ago
Thu, Aug 7 - Sun, Aug 10
LGA
LaGuardia
IAD
Washington Dulles Intl.
$159 Roundtrip, found 4 days ago
$159
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 7 from LaGuardia to Washington Dulles Intl., returning Sun, Aug 10, priced at $159 found 4 days ago
Thu, Aug 7 - Sat, Aug 16
LGA
LaGuardia
IAD
Washington Dulles Intl.
$160 Roundtrip, found 5 days ago
$160
Roundtrip
found 5 days ago
Select United flight, departing Thu, Aug 7 from LaGuardia to Washington Dulles Intl., returning Sat, Aug 16, priced at $160 found 5 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.