Chase added Air Canada Aeroplan as its newest Ultimate Rewards® point transfer partner earlier this summer. If you have an eligible Chase credit card, you can now transfer Ultimate Rewards® to Aeroplan at a 1:1 ratio.

This new partnership is great news for Chase cardholders — even if you aren't planning to fly Air Canada anytime soon. That's because Aeroplan is a partner of Chase, as well as a partner of over 40 airlines that serve a combined 1,300 destinations. You can use Aeroplan points to book award flights on all Star Alliance airlines and on award flights with a dozen non-alliance partners.

Before this addition, you could already use Chase points to book Star Alliance awards by transferring your Ultimate Rewards® points to United MileagePlus. But now, you may be able to book the same award flights for fewer points by transferring to Air Canada Aeroplan instead.

Let's take a look at five times you'll want to book awards through Air Canada instead of United.

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When to transfer Chase points to Aeroplan instead of United

This new partnership unlocks access to cheaper Star Alliance award flights in specific situations.

1. Fly to Hawaii for 12,500 points each way

Aeroplan offers one of the cheapest award flights you can book to Hawaii. You can book award flights on United for as few as 12,500 points each way in economy or 25,000 points each way in business class.

That's nearly half of the price that United charges for the same flights, which is at least 22,500 miles in economy or at least 40,000 miles in business class one-way.

United's award rates climb even higher for awards booked within 21 days of departure. However, you'll still pay just 12,500 points for economy or 25,000 points for business class when booking through Aeroplan for near-term flights.

There's a catch though: To get these rock-bottom rates, you'll need to fly a route that covers less than 2,750 miles in distance. You can book a connecting itinerary, but the total distance must be under 2,750 miles to get this rate. Since most flights from California to Hawaii are over 2,300 miles in distance (and closer to 2,500 miles), that doesn't give you much room to add connecting flights.

For flights covering more than 2,751 miles, Aeroplan charges 22,500 points for economy or 35,000 points in business class. That's around the same price that United charges, although you can save a bit by booking last-minute premium cabin awards through Aeroplan.

2. Short-haul flights within North America from 6,000 points

Aeroplan's cheapest awards are for short flights within North America. If you can keep your route to under 500 miles in distance, you'll pay just 6,000 Aeroplan points each way.

This redemption option can be particularly useful on flights where the time cost of driving exceeds the time you’d spend flying — such as from New York or Chicago to Toronto.

Since United doesn't publish an award chart, it can charge as many or as few miles as it wants for these types of flights. Generally speaking, comparable award flights between the U.S. and Canada cost at least 12,500 miles each way.

That means you can effectively book the same flight for less than half the number of Chase Ultimate Rewards® points by transferring points to Aeroplan instead of United.

3. Fly to Europe in lie-flat seats from 60,000 points

Aeroplan really excels when it comes to flying to Europe in a premium cabin. For flights between North America and the airline’s Atlantic region (Europe, Africa, Middle East and the Indian subcontinent), Aeroplan charges the following rates for award flights on partners:

The shortest distance band, 4,000 miles, can cover a lot of ground. For example, you can fly business class from Newark to Frankfurt or from Washington, D.C., to Paris for 60,000 points — or 90,000 points where first class is offered.

Comparatively, for awards to Europe booked within 21 days of departure, United charges 80,500 miles for business class and a whopping 121,000 miles for first class.

That means you can book through Aeroplan to save up to 20,500 points each way in business class or up to 31,000 points in first class.