What are the cheapest airlines to fly from Sheffield to Seattle one-way?

One-way options have recently been found by users for as low as £427 on Icelandair. Other airlines that offer cheap prices include Aer Lingus from £858 and United Airlines from £1,380 one-way.

What are the most popular airlines that fly from Sheffield to Seattle?

American Airlines, Air France and Finnair are the most popular airlines when flying from Sheffield to Seattle.

How far in advance should I book a flight from Sheffield to Seattle?

Find a great deal and save up to 53% by booking at least 58 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Sheffield to Seattle within the next two weeks, with the cheapest ticket starting at £520.

What is the cheapest month to fly from Sheffield to Seattle?

January is one of the best times of the year to fly to Seattle from Sheffield. Prices for January average £656 per person but you can even find prices for as low as £460. The most expensive prices can be found in the month of July. Opting for a January flight can save you 36% on your journey compared to booking in July

What airport do you fly into for flights to Seattle from Sheffield?

If you book a flight to Seattle from Sheffield, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 0 flights from Sheffield to Seattle/Tacoma Intl per day from 12 different airlines.

Can I find deals for flights from Sheffield to Seattle that include hotel bookings?

Yes. In addition to deals on Sheffield to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Sheffield to Seattle?

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

Can I find deals for business class flights from Sheffield to Seattle?

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

£327+ Flights from Sheffield to Seattle - Compare & Save Big

Cheapflights Tip: The best prices from Sheffield to Seattle/Tacoma Intl are usually found in January or March, booked 57 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Sheffield to Seattle

Round-trip from	£559
One-way from	£327
Popular in	July
Cheapest in	January
Average price	£625

Scandinavian Airlines
29/8-10/9
4 total stops
68h 08m total
Sheffield to Seattle

Search Deals

13/6
3 total stops
52h 11m total
Sheffield to Seattle

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£120 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from Sheffield to Seattle

Cheapest flights from Sheffield to Seattle
Explore the most affordable flight options available from Sheffield to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Wed 10/905:55MAN - SEA

1 stop18h 10mVirgin Atlantic

Wed 17/913:30SEA - MAN

1 stop15h 55mVirgin Atlantic

Deal found 30/4£554

Fri 29/820:25MAN - SEA

2 stops34h 28mScandinavian Airlines

Wed 10/916:00SEA - MAN

2 stops33h 40mScandinavian Airlines

Deal found 29/4£559

Sun 13/706:25MAN - SEA

3 stops38h 06mMultiple Airlines

Sun 20/723:30SEA - MAN

1 stop28h 10mMultiple Airlines

Deal found 30/4£562

Mon 5/508:00MAN - SEA

1 stop18h 20mBritish Airways

Mon 12/520:20SEA - MAN

1 stop13h 35mBritish Airways

Deal found 28/4£565

Wed 10/910:55MAN - SEA

2 stops18h 43mFinnair

Wed 17/910:46SEA - MAN

2 stops18h 24mFinnair

Deal found 29/4£570

Thu 11/911:50MAN - SEA

2 stops29h 31mAir Canada

Thu 25/919:15SEA - MAN

2 stops31h 05mAir Canada

Deal found 29/4£581

Mon 12/506:00MAN - SEA

2 stops37h 49mUnited Airlines

Mon 19/507:20SEA - MAN

2 stops19h 30mUnited Airlines

Deal found 28/4£588

Tue 23/909:10MAN - SEA

2 stops37h 06mLufthansa

Tue 30/907:05SEA - MAN

3 stops19h 20mLufthansa

Deal found 29/4£594

Mon 12/505:55MAN - SEA

2 stops23h 19mDelta

Mon 9/609:43SEA - MAN

2 stops17h 27mDelta

Deal found 29/4£627

Mon 26/518:40MAN - SEA

2 stops34h 31mSWISS

Mon 2/616:25SEA - MAN

1 stop17h 30mSWISS

Deal found 28/4£653

Fri 27/607:55MAN - SEA

2 stops22h 31mAmerican Airlines

Tue 15/713:16SEA - MAN

2 stops21h 49mAmerican Airlines

Deal found 29/4£672

Fri 27/620:40MAN - SEA

1 stop27h 15mKLM

Mon 14/717:35SEA - MAN

1 stop15h 10mKLM

Deal found 29/4£694

Best flights from Sheffield to Seattle
Discover carefully curated flight deals from Sheffield to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 April 2025.

Fri 29/820:25MAN - SEA

2 stops34h 28mScandinavian Airlines

Wed 10/916:00SEA - MAN

2 stops33h 40mScandinavian Airlines

Deal found 29/4£559

Sun 13/706:25MAN - SEA

3 stops38h 06mMultiple Airlines

Sun 20/723:30SEA - MAN

1 stop28h 10mMultiple Airlines

Deal found 30/4£562

Mon 12/508:55MAN - SEA

1 stop17h 25mBritish Airways

Mon 19/513:30SEA - MAN

1 stop14h 05mBritish Airways

Deal found 28/4£565

Wed 10/910:55MAN - SEA

2 stops18h 43mFinnair

Wed 17/910:46SEA - MAN

2 stops18h 24mFinnair

Deal found 29/4£570

Thu 11/911:50MAN - SEA

2 stops29h 31mAir Canada

Thu 25/919:15SEA - MAN

2 stops31h 05mAir Canada

Deal found 29/4£581

Mon 12/506:00MAN - SEA

2 stops37h 49mUnited Airlines

Mon 19/507:20SEA - MAN

2 stops19h 30mUnited Airlines

Deal found 28/4£588

Tue 23/909:10MAN - SEA

2 stops37h 06mLufthansa

Tue 30/907:05SEA - MAN

3 stops19h 20mLufthansa

Deal found 29/4£594

Mon 12/505:55MAN - SEA

2 stops18h 13mVirgin Atlantic

Mon 9/614:10SEA - MAN

1 stop12h 10mVirgin Atlantic

Deal found 29/4£600

Mon 12/505:55MAN - SEA

2 stops23h 19mDelta

Mon 9/609:43SEA - MAN

2 stops17h 27mDelta

Deal found 29/4£627

Mon 26/518:40MAN - SEA

2 stops34h 31mSWISS

Mon 2/616:25SEA - MAN

1 stop17h 30mSWISS

Deal found 28/4£653

Fri 27/607:55MAN - SEA

2 stops22h 31mAmerican Airlines

Tue 15/713:16SEA - MAN

2 stops21h 49mAmerican Airlines

Deal found 29/4£672

Fri 27/620:40MAN - SEA

1 stop27h 15mKLM

Tue 15/713:50SEA - MAN

1 stop12h 30mKLM

Deal found 29/4£694

Last-minute flights from Sheffield to Seattle
Discover last-minute flight deals from Sheffield to Seattle. Data last updated 30 April 2025 and is based on user searches.

Wed 30/413:05MAN - SEA

1 stop15h 35mIcelandair

Thu 15/515:45SEA - MAN

1 stop11h 55mIcelandair

Deal found 29/4£776

Wed 30/414:00MAN - SEA

1 stop12h 20mAmerican Airlines

Thu 15/513:30SEA - MAN

1 stop24h 30mAmerican Airlines

Deal found 30/4£904

Mon 5/508:00MAN - SEA

1 stop18h 20mBritish Airways

Mon 12/520:20SEA - MAN

1 stop13h 35mBritish Airways

Deal found 28/4£565

Mon 5/517:30MAN - SEA

4 stops58h 48mEthiopian Air

Mon 12/508:10SEA - MAN

3 stops64h 05mEthiopian Air

Deal found 28/4£3,110

Tue 6/506:05MAN - SEA

2 stops18h 17mMultiple Airlines

Tue 13/510:55SEA - MAN

2 stops15h 30mMultiple Airlines

Deal found 29/4£597

Mon 12/506:00MAN - SEA

2 stops37h 49mUnited Airlines

Mon 19/507:20SEA - MAN

2 stops19h 30mUnited Airlines

Deal found 28/4£588

Mon 12/505:55MAN - SEA

2 stops18h 13mVirgin Atlantic

Mon 9/614:10SEA - MAN

1 stop12h 10mVirgin Atlantic

Deal found 29/4£600

Mon 12/505:55MAN - SEA

2 stops23h 19mDelta

Mon 9/609:43SEA - MAN

2 stops17h 27mDelta

Deal found 29/4£627

Mon 12/506:05MAN - SEA

2 stops18h 17mLufthansa

Mon 9/612:00SEA - MAN

3 stops38h 25mLufthansa

Deal found 30/4£951

Mon 12/520:55MAN - SEA

1 stop28h 04mAer Lingus

Sun 8/600:05SEA - MAN

2 stops23h 30mAer Lingus

Deal found 29/4£1,234

Mon 19/507:45MAN - SEA

2 stops18h 05mMultiple Airlines

Mon 26/515:45SEA - MAN

3 stops33h 45mMultiple Airlines

Deal found 28/4£574

Tue 20/519:10MAN - SEA

1 stop26h 40mScandinavian Airlines

Tue 27/514:20SEA - MAN

2 stops20h 00mScandinavian Airlines

Deal found 29/4£599

One-way flights from Sheffield to Seattle
Search for one-way flight options from Sheffield to Seattle. Find affordable one-way fares based on user searches. Data last updated 30 April 2025.

Fri 13/616:20MAN - SEA

3 stops52h 11mMultiple Airlines

Deal found 29/4£327

Mon 6/1012:40MAN - SEA

1 stop16h 00mIcelandair

Deal found 29/4£427

Thu 3/712:05MAN - SEA

1 stop13h 45mAer Lingus

Deal found 29/4£858

Mon 6/1010:35MAN - SEA

3 stops37h 34mUnited Airlines

Deal found 29/4£1,380

Tue 7/1018:30MAN - SEA

4 stops58h 12mEthiopian Air

Deal found 29/4£1,724

Wed 2/711:00MAN - SEA

3 stops42h 53mTAP AIR PORTUGAL

Deal found 29/4£1,903

Wed 2/723:15MAN - SEA

1 stop26h 00mTurkish Airlines

Deal found 29/4£2,165

Cheapflights Fare Finder

Use the filters below to find and compare flights from Sheffield to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Fri 29/8

20:25-22:53

2 stops34h 28m

Seattle/Tacoma Intl

Wed 10/9

16:00-09:40

2 stops33h 40m

£559

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Sun 13/7

06:25-12:31

3 stops38h 06m

Seattle/Tacoma Intl

Sun 20/7

23:30-11:40

1 stop28h 10m

£562

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Mon 12/5

08:55-18:20

1 stop17h 25m

Seattle/Tacoma Intl

Mon 19/5

13:30-11:35

1 stop14h 05m

£565

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Wed 10/9

10:55-21:38

2 stops18h 43m

Seattle/Tacoma Intl

Wed 17/9

10:46-13:10

2 stops18h 24m

£570

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Thu 11/9

11:50-09:21

2 stops29h 31m

Seattle/Tacoma Intl

Thu 25/9

19:15-10:20

2 stops31h 05m

£581

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Mon 12/5

06:00-11:49

2 stops37h 49m

Seattle/Tacoma Intl

Mon 19/5

07:20-10:50

2 stops19h 30m

£588

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Tue 23/9

09:10-14:16

2 stops37h 06m

Seattle/Tacoma Intl

Tue 30/9

07:05-10:25

3 stops19h 20m

£594

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Mon 12/5

05:55-16:08

2 stops18h 13m

Seattle/Tacoma Intl

Mon 9/6

14:10-10:20

1 stop12h 10m

£600

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Mon 12/5

05:55-21:14

2 stops23h 19m

Seattle/Tacoma Intl

Mon 9/6

09:43-11:10

2 stops17h 27m

£627

ManchesterSeattle

MAN - SEA

MANSEA

Manchester

Mon 26/5

18:40-21:11

2 stops34h 31m

Seattle/Tacoma Intl

Mon 2/6

16:25-17:55

1 stop17h 30m

£653

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 24 results

Best time to book a flight from Sheffield to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Sheffield with our price prediction graph.

Estimated return 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.

Cheapflights Insights

Everything you need to know about your flight from Sheffield to Seattle

How far ahead should I book a flight from Sheffield to Seattle?

The best time to book flights from Sheffield to Seattle is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Sheffield to Seattle?

Currently, January is the cheapest month in which you can book a flight from Sheffield to Seattle (average of £622). Flying from Sheffield to Seattle in July is currently the most expensive (average of £946). 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.

What is the cheapest time of day to fly from SH9 to SEA?

When flying from Sheffield to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Sheffield to Seattle?

Travellers seeking maximum savings on their Sheffield to Seattle flight should consider departing on Monday afternoons when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Seattle by month

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

If weather is an important factor for your trip to Seattle, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,936 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,334 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,275 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS

7.5

Good

1,588 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines

7.4

Good

8,696 reviews

Delta

8.0

Very Good

7,936 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What airport do you fly into for flights to Seattle from Sheffield?
If you book a flight to Seattle from Sheffield, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 0 flights from Sheffield to Seattle/Tacoma Intl per day from 12 different airlines.
What are the cheapest airlines to fly from Sheffield to Seattle one-way?
One-way options have recently been found by users for as low as £427 on Icelandair. Other airlines that offer cheap prices include Aer Lingus from £858 and United Airlines from £1,380 one-way.
Can I find deals for flights from Sheffield to Seattle that include hotel bookings?
Yes. In addition to deals on Sheffield to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Sheffield to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sheffield to Seattle.
Can I find deals for business class flights from Sheffield to Seattle?
Yes. Cheapflights offers flight deals from Sheffield to Seattle 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 Sheffield to Seattle?
Currently, January is the cheapest month in which you can book a flight from Sheffield to Seattle (average of £622). Flying from Sheffield to Seattle in July is currently the most expensive (average of £946). 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

Tacoma

Leavenworth

Bothell

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Sheffield to Seattle

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Top 10 airlines flying from Sheffield to Seattle

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£459	Average£635	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Finnair	Cheapest£474	Average£625	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£475	Average£596	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Air France	Cheapest£478	Average£652	FlexibilityNo cancel fee	On-time77%	Search Air France flights
American Airlines	Cheapest£480	Average£708	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
Icelandair	Cheapest£486	Average£603	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
British Airways	Cheapest£493	Average£729	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Virgin Atlantic	Cheapest£502	Average£701	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Aer Lingus	Cheapest£507	Average£835	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
KLM	Cheapest£515	Average£660	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Fly with Cheapflights

How does Cheapflights help users find flights from Sheffield to Seattle?

Deals for Sheffield to Seattle 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 Sheffield to Seattle?

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

Can Cheapflights find flights from Sheffield to Seattle with no change fees?

Certainly. Search results for flights to Seattle from Sheffield shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Sheffield to Seattle become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Sheffield today and book when prices fit your budget.

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Cheap flights from Sheffield to Seattle from £327

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 13/6. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Sheffield to Seattle/Tacoma Intl are usually found in January or March, booked 57 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Sheffield to Seattle

Keep the following information in mind while searching for Sheffield to Seattle flight deals. Data was last updated 30 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Sheffield to Seattle

Cheapest flights from Sheffield to SeattleExplore the most affordable flight options available from Sheffield to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Explore the most affordable flight options available from Sheffield to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Sheffield to Seattle that are best for you.

Best time to book a flight from Sheffield to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Sheffield with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Sheffield to Seattle

How far ahead should I book a flight from Sheffield to Seattle?

Use this chart to determine the optimal time to book a return flight from Sheffield to Seattle. Price data was last updated on 25 April 2025.

What is the cheapest month to book a flight from Sheffield to Seattle?

What is the cheapest time of day to fly from SH9 to SEA?

Find hourly flight availability from Sheffield to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 April 2025.

What is the cheapest day to fly from Sheffield to Seattle?

Use this chart to determine the cheapest time to fly return from Sheffield to Seattle. Price data was last updated on 16 December 2024.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

Reviews of airlines servicing Seattle

Related info for your journey

Find useful and relevant information for your journey from Sheffield to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Seattle from Sheffield?

What are the cheapest airlines to fly from Sheffield to Seattle one-way?

Can I find deals for flights from Sheffield to Seattle that include hotel bookings?

How can I find direct flights from Sheffield to Seattle?

Can I find deals for business class flights from Sheffield to Seattle?

What is the cheapest month to book a flight from Sheffield to Seattle?

Travelling to a place near Sheffield?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Sheffield to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Sheffield to Seattle

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Sheffield to Seattle?

Why should you use Cheapflights to find cheap flight tickets from Sheffield to Seattle?

Can Cheapflights find flights from Sheffield to Seattle with no change fees?

Can Cheapflights notify me if prices for flights from Sheffield to Seattle become cheaper?

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Cheapest flights from Sheffield to Seattle
Explore the most affordable flight options available from Sheffield to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.