Alaska Airlines Flight 340 Deals & Information (2026/2027)

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Alaska Airlines Flight 340 Route Deals From $89

The cheapest prices found with in the last 7 days for return flights were $157 and $89 for one-way flights to Los Angeles - Ontario Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Apr 10 - Mon, Apr 13
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$157 Roundtrip, found 2 hours ago
$157
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, Apr 10 from Portland Intl. to Los Angeles - Ontario Intl., returning Mon, Apr 13, priced at $157 found 2 hours ago
Mon, Mar 2 - Mon, Mar 9
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$160 Roundtrip, found 6 hours ago
$160
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Mon, Mar 2 from Portland Intl. to Los Angeles - Ontario Intl., returning Mon, Mar 9, priced at $160 found 6 hours ago
Sat, Feb 7 - Sun, Feb 8
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$161 Roundtrip, found 3 days ago
$161
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Feb 7 from Portland Intl. to Los Angeles - Ontario Intl., returning Sun, Feb 8, priced at $161 found 3 days ago
Sun, Mar 8 - Sat, Mar 14
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$161 Roundtrip, found 10 hours ago
$161
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Sun, Mar 8 from Portland Intl. to Los Angeles - Ontario Intl., returning Sat, Mar 14, priced at $161 found 10 hours ago
Fri, Mar 6 - Mon, Mar 9
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$162 Roundtrip, found 4 hours ago
$162
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Fri, Mar 6 from Portland Intl. to Los Angeles - Ontario Intl., returning Mon, Mar 9, priced at $162 found 4 hours ago
Thu, Apr 2 - Thu, Apr 9
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$174 Roundtrip, found 9 hours ago
$174
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Thu, Apr 2 from Portland Intl. to Los Angeles - Ontario Intl., returning Thu, Apr 9, priced at $174 found 9 hours ago
Sat, Mar 7 - Wed, Mar 11
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$180 Roundtrip, found 1 day ago
$180
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Mar 7 from Portland Intl. to Los Angeles - Ontario Intl., returning Wed, Mar 11, priced at $180 found 1 day ago
Thu, Mar 26 - Wed, Apr 1
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$181 Roundtrip, found 5 hours ago
$181
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Thu, Mar 26 from Portland Intl. to Los Angeles - Ontario Intl., returning Wed, Apr 1, priced at $181 found 5 hours ago
Wed, Apr 29 - Sat, May 2
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$182 Roundtrip, found 5 days ago
$182
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Wed, Apr 29 from Portland Intl. to Los Angeles - Ontario Intl., returning Sat, May 2, priced at $182 found 5 days ago
Sun, Feb 15 - Wed, Feb 18
PDX
Portland Intl.
ONT
Los Angeles - Ontario Intl.
$185 Roundtrip, found 4 days ago
$185
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sun, Feb 15 from Portland Intl. to Los Angeles - Ontario Intl., returning Wed, Feb 18, priced at $185 found 4 days ago

Frequently asked questions

What route does flight number AS340 take?
AS340 operates from San Francisco Intl. Airport (SFO) to Newark, NJ Airport (EWR-Liberty Intl.) and is a direct flight. This journey usually takes 5 hours and 45 minutes.
What terminal does AS340 fly out of?
AS340 runs between SFO and Liberty Intl. Airport (EWR), and travelers with a seat on this flight generally board the plane from Terminal 2.
What kind of plane is on flight number AS340?
The Boeing 737-800 is the type of aircraft most often used for flight AS340. This flight almost always departs from SFO and arrives at Newark, NJ Airport (EWR-Liberty Intl.).
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 AS340 flight with Travelocity, please visit our Customer Service Portal.