Catalina Express had three terminals, San Pedro, Long Beach and Dana Point. The locations of LAX, LGB and SNA are also shown on this map.

https://cimg9.ibsrv.net/gimg/www.fly...1be5c861c2.jpg

LGB was great for JetBlue while it lasted, but I suspect that ship has sailed. JetBlue now has greater aspirations, particularly with their merger plans with Spirit. Access to hub airports with larger connection options likely plays a big part.

If you ultimately need to get to Catalina Island, there are a few other options:

From SNA, there a Catalina Express option from Dana Point (fewer daily departures, though)

From LAX, you can depart from San Pedro via Catalina Express (a bit closer than Long Beach)

That said, if the timing works better, you could get to San Pedro from LGB as well.

Or, if you really want to get there quickly, there's the helicopter service: https://iexhelicopters.com/catalina/#open

I did the helicopter about 20 years ago and it was a great experience - they fly relatively low so you get great views.

If you count the Queen Mary terminal, also located in Long Beach, which is used for the smaller Catalina Express boats that are used for camp charters, there are actually four terminals.

The Catalina Express website lists only one location at the Long Beach Port.

That's the one at the Downtown Catalina Landing, but I've confirmed with their reservation agents that the Queen Mary Terminal is used for the Catalina Camp Charters, which are serviced by the 149-passenger Catalina Express boats. The larger Catamarans go mostly from the Downtown Catalina Landing in Long Beach.

to add…Long Beach does not work with partner aircraft ( especially international ones).

It is not a single flight.

Here's an example of a flight itinerary that I've made. This will show you how ridiculous I think it is that flights go out of the way before they reach your destination. Round trip to Long Beach | Google Flights

If you want to tour the country, and are willing to drop $1000, of course airlines will oblige your request.

Tour the country? I'm confused! What I was actually trying to find is a direct flight to Long Beach.

what you have is a nuts routing I’d never do but the algorithm finds.

for AA you will likely need to connect thrus PHX, DFW, or ORD since it’s west coast hub is in LAX butbthey won’t connect thru LAX because it’s too close

United airlines woukd route you thru Sam Fran or denver
deltathru Seattle or salt lake city
southwest will have you connect thru oakland, San Jose, SAcramento, vegas, or Phoenix into Santa Ana or LAX
Alaska will route you thru San Francisco or Seattle if you don’t take a direct from Pdx to Santa Ana.

for fun…look at flying from Portland to Seattle on united or delta or southwest…

Before deregulation, passenger air routes were controlled by the US government. An airline wanting to serve LAX to SFO, for example, might have to promise a nonstop service from LAX to Bend, Oregon, for example. In this way, small cities like Bend were given non-stop service which a free market would otherwise not support. The congressman from Bend, of course, would benefit.

After deregulation, the hub-and-spoke routing system emerged. In that scenario, Bend (if it had any remaining commercial air service at all) would be connected to LAX via an airline's hub city.

That's simply the search engine returning all sorts of flight options.

When you search on Google Flights, you can set filters to limit the outcomes such as only seeing nonstops or 1-stop or less. You can also search multiple origins and destinations in a single search.
As an example, using your dates, I ran a quick search and you can do a nonstop from Portland to LAX or there are plenty of 1-stop options from Eugene to Long Beach.
The Portland-LAX options appear to be half the cost of the 1-stop options to LGB.

Google Flights won't return results for Southwest, so you'll need to search that separately on their website.

As a smaller airport serving a smaller metro area, the Eugene airport typically won't have nonstop flights except to hub airports for the airlines where folks can then connect to their ultimate destinations. Long Beach itself is part of large metro (LA), but it isn't a "hub" for any of the airlines so the options are also limited.