What is the cheapest month to book a flight from Thunder Bay to Portland?

Currently, August is the cheapest month in which you can book a flight from Thunder Bay to Portland (average of C$ 259). Flying from Thunder Bay to Portland in December is currently the most expensive (average of C$ 401). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in Portland ranges from 18.0 - 142.0 mm per month. November is typically the wettest month, when rainfall can reach 142.0 mm. July is typically the driest time to visit Portland when rainfall is around 18.0 mm.

If weather is an important factor for your trip to Portland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

What is the cheapest time of day to fly from YQT to PDX?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Thunder Bay to Portland as you normally would.

Can I find deals for flights from Thunder Bay to Portland that include hotel bookings?

Yes. In addition to deals on Thunder Bay to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Thunder Bay to Portland?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Thunder Bay to Portland.

Can I find deals for business class flights from Thunder Bay to Portland?

Yes. Cheapflights offers flight deals from Thunder Bay to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 303+ Cheap Flights from Thunder Bay to Portland

Find flight deals from Thunder Bay to Portland

One-way flights from Thunder Bay to Portland
Search for one-way flight options from Thunder Bay to Portland. Find affordable one-way fares based on user searches. Data last updated 16 September 2025.

Wed 29/105:00 a.m.YQT - PDX

2 stops16h 30mAir Canada

Deal found 14/9C$ 303

Wed 29/105:00 a.m.YQT - PDX

3 stops16h 36mUnited Airlines

Deal found 14/9C$ 304

Cheapflights Fare Finder

Use the filters below to find and compare flights from Thunder Bay to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Thunder BayPortland

YQT - PDX

YQTPDX

Thunder Bay

Wed 29/10

5:00 a.m.-6:30 p.m.

2 stops16h 30m

C$ 303

Thunder BayPortland

YQT - PDX

YQTPDX

Thunder Bay

Wed 29/10

5:00 a.m.-6:36 p.m.

3 stops16h 36m

C$ 304

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

Best time to book a flight from Thunder Bay to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from Thunder Bay with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Can I find deals for flights from Thunder Bay to Portland that include hotel bookings?
Yes. In addition to deals on Thunder Bay to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Thunder Bay to Portland?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Thunder Bay to Portland.
Can I find deals for business class flights from Thunder Bay to Portland?
Yes. Cheapflights offers flight deals from Thunder Bay to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Thunder Bay to Portland?
Currently, August is the cheapest month in which you can book a flight from Thunder Bay to Portland (average of C$ 259). Flying from Thunder Bay to Portland in December is currently the most expensive (average of C$ 401). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Vancouver

Seaside

Tillamook

Cannon Beach

Lincoln City

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

How does Cheapflights help users find flights from Thunder Bay to Portland?

Deals for Thunder Bay to Portland flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Thunder Bay to Portland?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Thunder Bay to Portland for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Thunder Bay to Portland with no change fees?

Yes! Cheapflights helps users easily find flights from Thunder Bay to Portland with no change fees.

Can Cheapflights notify me if prices for flights from Thunder Bay to Portland become cheaper?

Of course! You can now track prices for flights from Thunder Bay to Portland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Thunder Bay to Portland from C$ 303

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/10. Fares are subject to change and may not be available on all flights or dates of travel.