United Flight 3688 Deals & Information (2025/2026)

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United Flight 3688 Route Deals From $47

The cheapest prices found with in the last 7 days for return flights were $113 and $47 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jan 8 - Sun, Jan 11
LGA
LaGuardia
IAD
Washington Dulles Intl.
$113 Roundtrip, found 1 day ago
$113
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 8 from LaGuardia to Washington Dulles Intl., returning Sun, Jan 11, priced at $113 found 1 day ago
Thu, Feb 5 - Sun, Feb 8
LGA
LaGuardia
IAD
Washington Dulles Intl.
$127 Roundtrip, found 4 days ago
$127
Roundtrip
found 4 days ago
Select United flight, departing Thu, Feb 5 from LaGuardia to Washington Dulles Intl., returning Sun, Feb 8, priced at $127 found 4 days ago
Fri, Feb 6 - Sun, Feb 8
LGA
LaGuardia
IAD
Washington Dulles Intl.
$129 Roundtrip, found 2 days ago
$129
Roundtrip
found 2 days ago
Select United flight, departing Fri, Feb 6 from LaGuardia to Washington Dulles Intl., returning Sun, Feb 8, priced at $129 found 2 days ago
Sun, May 3 - Thu, May 7
LGA
LaGuardia
IAD
Washington Dulles Intl.
$132 Roundtrip, found 1 day ago
$132
Roundtrip
found 1 day ago
Select United flight, departing Sun, May 3 from LaGuardia to Washington Dulles Intl., returning Thu, May 7, priced at $132 found 1 day ago
Thu, Feb 5 - Sun, Feb 8
LGA
LaGuardia
IAD
Washington Dulles Intl.
$132 Roundtrip, found 4 days ago
$132
Roundtrip
found 4 days ago
Select United flight, departing Thu, Feb 5 from LaGuardia to Washington Dulles Intl., returning Sun, Feb 8, priced at $132 found 4 days ago
Fri, Feb 6 - Sun, Feb 8
LGA
LaGuardia
IAD
Washington Dulles Intl.
$133 Roundtrip, found 2 days ago
$133
Roundtrip
found 2 days ago
Select United flight, departing Fri, Feb 6 from LaGuardia to Washington Dulles Intl., returning Sun, Feb 8, priced at $133 found 2 days ago
Wed, Dec 31 - Thu, Jan 1
LGA
LaGuardia
IAD
Washington Dulles Intl.
$150 Roundtrip, found 6 days ago
$150
Roundtrip
found 6 days ago
Select United flight, departing Wed, Dec 31 from LaGuardia to Washington Dulles Intl., returning Thu, Jan 1, priced at $150 found 6 days ago
Thu, Jan 8 - Sun, Jan 11
LGA
LaGuardia
IAD
Washington Dulles Intl.
$155 Roundtrip, found 1 day ago
$155
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 8 from LaGuardia to Washington Dulles Intl., returning Sun, Jan 11, priced at $155 found 1 day ago
Fri, Jan 23 - Sun, Jan 25
LGA
LaGuardia
IAD
Washington Dulles Intl.
$163 Roundtrip, found 1 day ago
$163
Roundtrip
found 1 day ago
Select United flight, departing Fri, Jan 23 from LaGuardia to Washington Dulles Intl., returning Sun, Jan 25, priced at $163 found 1 day ago
Sun, Jan 11 - Mon, Jan 12
LGA
LaGuardia
IAD
Washington Dulles Intl.
$167 Roundtrip, found 19 hours ago
$167
Roundtrip
found 19 hours ago
Select United flight, departing Sun, Jan 11 from LaGuardia to Washington Dulles Intl., returning Mon, Jan 12, priced at $167 found 19 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.